Problems with Redmi Note 8 – Corruption of encrypted file systems on SD-Card
Tested with:
• Redmi Note 8 4GB, 64GB
• Redmi Note 8 4GB, 128GB
Tested with:
• Adata 128GB A1 micro SD (x2)
• Lexar 64GB 633x micro SD
• Lexar 32GB 633x micro SD
• Samsung EVO 32GB micro SD
Problem: Encrypted file system on SD-card becomes corrupted every time a large number of files are copied to it. This has been confirmed on two Redmi Note 8 phones and 6x SD cards. All SD-cards have been tested with “badblocks” and they’re working perfectly in other phones and video cameras. Cards also work fine in these phones when set up as unencrypted "portable storage".
How to verify that file-system is corrupt:
via adb:
Above screenshot shows “du” reporting 13M of storage consumed on SD-card, while “df” reports 90G of storage consumed on SD-card. This state is due to corrupted directories which cannot be removed/deleted, renamed, or populated.
The steps outlined below have been duplicated very consistently on these phones. I now own two phones that are not usable, and I’m not happy at all. How to reproduce:
1. Follow instructions here - https://c.mi.com/thread-2601107-1-0.html - [Tips] Enable Adoptable Storage On Mi Phone, or:
2. Insert an unformatted SD-card and follow the prompts to use it as adopted phone storage.
3. SD-card is now set up as encrypted & adopted storage.
4. Copy a lot of files to the SD-card. This can be done via MTP (GUI), adb “push”, using the built-in file browser’s unzip, tar, cpio, etc.
5. It makes no difference how the files are copied to the phone. The most reliable way I found to duplicate this fault is to use “adb push” to copy large music (mp3) directories to the phone. Example via abd would be similar to (but not necessarily identical to) this:
Code:
adb push ~/music/* /sdcard/Music/
6. As files are copying to phone, there may or may not be an “I/O error”. After several GBs of files are copied, there will usually be one or more corrupted directories which can not be removed/deleted, can not be renamed, can not be populated, and appears empty, but they are consuming file system space, as evident with “df”.
7. The corrupted directories are easily found with this (or similar, depending on where the files were copied to):
Code:
rm -r /sdcard/Music/
That will show “Directory not empty” error messages for corrupted directories. Using the built-in file-browser, attempting to delete these corrupt directories will result in a "Couldn't delete file" error.
8. This was first discovered on a Redmi Note 8 4GB/64GB. After testing with several cards, I thought the phone was defective. I then purchased a Redmi Note 8 4GB/128GB phone, and the same problem immediately became apparent. Is this a design flaw? Is this a hardware problem? I have reason to suspect that this is also a problem with custom ROMs, indicating that this is a hardware problem.
9. I now have two of these phones that are not working properly. A functioning file system is essential, thus I consider this a very significant problem. Xiaomi "support" is being 100% useless.
10. But wait, there's more. When attempting to do an official firmware update, the updater hangs at 99% downloading, then fails, when an adopted/encrypted SD-card is installed. Removing the SD-card from the phone does NOT resolve this issue. In order to resolve this issue, the adopted/encrypted SD-card needs to be "forgotten".
When using these phones with SD-cards set up as "portable storage", these problems can not be reproduced.
This is core functionality that's broken.
I'm not sure what to do, since returning these phones is probably not a viable option (because of shipping restrictions on phones with lithium batteries), and Xiaomi is refusing to provide any form of useful support.
Can anyone else confirm that these problems are happening or not? How old is the phone that you're testing with? Thanks…
It would be greatly appreciated if these bugs can be confirmed or repudiated on other devices. Anyone???
Xiaomi "support" just keeps repeating that I should factory-reset the phone. They refuse to either confirm or deny that these are bugs in this phone.
I've been unable to get any support from Xiaomi beyond "factory reset" and "return to seller". Neither of these options are viable for me. I can't see myself buying any more Xiaomi/Redmi products in the future.
I own a Ginkgo and will try it
And will inform you as soon as possible
---------- Post added at 09:56 AM ---------- Previous post was at 09:52 AM ----------
go vegan said:
I've been unable to get any support from Xiaomi beyond "factory reset" and "return to seller". Neither of these options are viable for me. I can't see myself buying any more Xiaomi/Redmi products in the future.
Click to expand...
Click to collapse
You phone is now bricked I think
Testing with a 32GB card, this is normal, right? :cyclops:
-77GB of system system storage?
And of course, a lot of corrupt files and directories that can't be deleted, and a huge discrepancy between between "du" and "df". Brand new phone, and Xiaomi is doing NOTHING that resembles customer support The Motorola G8 lineup is looking good.
go vegan said:
Testing with a 32GB card, this is normal, right? :cyclops:
-77GB of system system storage?
And of course, a lot of corrupt files and directories that can't be deleted, and a huge discrepancy between between "du" and "df". Brand new phone, and Xiaomi is doing NOTHING that resembles customer support The Motorola G8 lineup is looking good.
Click to expand...
Click to collapse
I have 2 sd cards
1. MicroSD 2Gb
2. SanDisk 8Gb Class4
Which do you think should i test with ?
I think you might have got a faulty product i searched in Google for the problem and nothing found about it
Moto is good but i bought Ginkgo for custom roms and development ?
Try to copy small amounts of data in sd card, don't do it all at once.
maybe Phone/Sd Card may not have that much capacity to transfer all that data at once as a PC.
Try to use sd Card through an OTG and a card reader via
usb charging Port and if it transfers all data at once successfully to sd card then surely problem is in phone
I hope you got it
I've got two of these Redmi Note 8 phones, one of them 4GB/64GB, one of them 4GB/128GB. I got them because they seemed like good value phones with lots of community support. They both have the exact same problems, brand new, out of the box.
I'd suggest testing with the larger card, so you can copy more files per test, and duplicate the fault faster.
Copying files faster can aggravate the problem, but copying files slower just takes longer for the problem to manifest. How I copy files makes no difference. Even unpacking a ZIP file can do it.
Also, try this if you can:
Factory-reset the phone
Put an un-formatted SD-card in the phone
Follow the prompts to set up the SD-card as adoptable storage (as per my screen-shots)
Settings → About Phone → System update
See if that works. For me it hangs at 99% and fails. The only way to make it work is to remove the SD-card, and "forget" the SD-card.
Yeah, I noticed this too! An easy fix is to run Window's "Scan and Repair"
Tech_Expert said:
Yeah, I noticed this too! An easy fix is to run Window's "Scan and Repair"
Click to expand...
Click to collapse
Does it resolved problem
?
Tech_Expert said:
Yeah, I noticed this too! An easy fix is to run Window's "Scan and Repair"
Click to expand...
Click to collapse
1- Not in a Linux environment; we use fsck for that.
2- Not with SD-cards that are adopted/encrypted.
For adopted/encrypted SD-cards, see this. I wrote that how-to a couple of years ago, but I shouldn't need to do that every few days, or hours. When I wrote that, I had a card that actually went bad.
my phone seems to have no problem i copied 6.23Gb of data to sandisk
it was sucessful no problem
T.Y.M.SAI said:
my phone seems to have no problem i copied 6.23Gb of data to sandisk
it was sucessful no problem
Click to expand...
Click to collapse
With the SD-card adopted and encrypted?
Keep trying with other music collections, and I'll be impressed if you can't duplicate the error. The error will be obvious when you can't delete the directory.
Related
I decided to replace the 512 MB card in my Cingular 8525 with a 2 GB card. When I put the 512 card in its adaptor, the PC read the directory, showed a FAT format, but would not copy/read/or otherwise manipulate any of the files. I plugged the card back into the 8525 and found that it couldn't even see it. Giving up on any kind of file recovery, I tried to reformat it in the PC, but then IT couldn't detect the card! After I played with it awhile, I finally got it to start the format process, but it always failed just before the "green line got to the end" and, after several attempts, it reported "disk cannot be formatted."
Is there any way I can save this card, or is it a (VERY small) boat anchor?
I've seen yesterday in the Sandisk site and somebody told me that they have some kind of software tool (file recover, unformat, etc.), that's very capable, unfortunately it is not free, there's a trial version (does not allow to save any files). Sofware's name is "Rescue Pro", if you can get yourself a copy you might give it a try.
Another thing about an SD (in my experience), I'm talking about a Verbatim 512MB SD, i borrow it to a friend, when he was giving it back, just cancelled all his things up, stopped the card reader (from XP), extracted the SD and it was dead, fortunately I had kept my proof of purchase and they (Verbatim) exchanged it with a new one (in europe the warranty is at least 2 year long), they asked me to send it to Ireland to check if it could be recovered and within three weeks (just because there was christmas in the middle) I got a new one back.
hope this helps
Try putting it in a Digital Camera with SD Slot (put in SD Adapter first;-))
Then format it via your Digital Camera
Or
Download VaioSoft Recovery Manager and try to format with that one
http://vaiosoft.com/products/recoverymanager.htm
Eelcol
that link is not working please post another link for that software
What PQI support suggests
I´ve had trouble with PQI miniSD cards, so I asked support from PQI on corrupted files, this is their answer in order to check if the card is damaged or not and includes several tips on using memory cards, it´s alittle bit long to read, but maybe it worths, so here it goes:
Some hints of using flash memory cards
1. Do NOT remove the memory card while it is operating, otherwise it may be
damaged.
2. Do NOT turn off the device, while the operation of writing /reading is
not completed.
3. When the battery power of system is low, do not write to the memory card to prevent loss of data.
4. Make sure the device (card reader/phone/camera/pda/camcorder) has finished reading/writing to the card before you take another shot/turn it off or the data will be corrupt/lost and the card will be damaged. You can tell by the device indicator light where it flashes when it is reading and writing to the card. Wait until the indicator light is off and stops flashing before you take another shot/turn the device off or remove the card/drive.
Before you continue, please make sure you have a reader that can read and write to 2GB card properly. DO NOT use in built-in reader on laptop and desktop, or old readers made 2 years or longer ago, because these readers can only use up to 1GB card. I recommend using it in external USB 2.0 reader that is made within 1 year ago.
If you do not have such reader, then connect the device (gps/camera/pda/camcorder) to the computer with USB cable and the card inserted and if works you should see new drive letters show up under My Computer.
Otherwise, if used in devices that do not support the 2GB card, the card will be damaged.
Please try the following troubleshooting guide first and see if it can solve the problem. Try one step at a time. If one works, then you can stop trying. You don't need to try all of them.
The following guide will erase all the data on the drive/card. So make sure you backup your data first before you try the steps below:
1. First, remove the card/drive from your computer.
Download the low level format tool below to your computer.
http://hddguru.com/download/software/HDDGURU-Low-Level-Format-Tool/LLFsetup.2.36.1181.exe
Install the program into your computer.
You should see a new icon called "Hard Disk Low Level Format Tool".
a. Insert the card/drive and run the program.
IMPORTANT!!! MAKE SURE YOU SELECT THE CORRECT DISK OR YOUR COMPUTER MAY NOT START LATER!!!
It should shows as BUS: USB. Select the BUS: USB. Also check the size and make sure.
If you don't see BUS: USB, that means the card is unreadable and need to be replaced. In this case, please STOP here and close the program and DO NOT continue below.
b. Then click Continue->Low Level Format->Format this Device.
c. Wait for a few minutes until it finish successfully with a message of asking you to partition and format it. (if you see formatting error, you can stop the formatting and the card needs to be replaced.)
d. Flash Card:
Put the card back to your device (camera/phone/pda/camcorder) and then use the format utility in the device to format the card.
Please let me know your test results. Thanks.
Reference: Program homepage
http://hddguru.com/content/en/software/2006.04.12-HDD-Low-Level-Format-Tool/
2. Please go to the site below:
http://www.sdcard.org/Downloads.aspx
Please try to download the software sdfv2000.exe (for windows only) and the manual for your reference.
Install the sdfv2000.exe in your computer, then insert the card into the card reader (if you do not have reader, you can try to connect your device to the computer with USB cable) and then run it:
a. Check the drive letter and also the size and make sure it is the correct card.
b. Click Option:
Format Type: Full Erase ON
Format Size Adjustment: ON
c. Click OK, then click Format. Wait until it finish.
d. You will be prompted to remove the card after it finish. Then go ahead and insert it in your (camera/pda/camcorder etc) and see.
16. T-mobile MDA (cannot format 2GB mini SD card)
Please install the software below to your phone (you can download the free trial):
http://www.pdatopsoft.com/PocketPC/StorageTools---Analyze,-Defragment,-Verify,-Repair-and-Format
Then use the Storage Tools software above to format the card and see.
does this method also apply on mini sd and mmc rs dv cards?????
Actually this was given for miniSD´s
Awais said:
does this method also apply on mini sd and mmc rs dv cards?????
Click to expand...
Click to collapse
I assume that this applies to all types of SD cards, I don´t know about the others.
Awais said:
that link is not working please post another link for that software
Click to expand...
Click to collapse
http://vaiosoft.com
goto recovery manager
Eelco
luiggi said:
I assume that this applies to all types of SD cards, I don´t know about the others.
Click to expand...
Click to collapse
is there any technical differnece between mmc and sd cards???/
cuz we can also use mmc or rs dv cards in htc devices but sd card is not useable for nokia and other mmc supported sets
Thanks for all of the input! I tried formating it with my camera with no success, then took the easy way out: I took it back where I bought it and got it replaced.
I'm filing this information away for next time, though! Thanks again.
Awais said:
is there any technical differnece between mmc and sd cards???/
cuz we can also use mmc or rs dv cards in htc devices but sd card is not useable for nokia and other mmc supported sets
Click to expand...
Click to collapse
SD cards where made to improve the lack of speed of MMC cards, also they include the writing protection/lock, it is the small switch you see in one side of the SD.
Also, SD cards are slightly different from MMCs phisically, SDs are thicker than MMCs (that's why you cannot put them in a Nokia phone), the electrical specs should by backwards compatible (aside from phisycal differences).
Recently some updatings/improvements have been done to MMC specs, they claim to be the fastest memory card technology available, there are MMC plus, etc.
I know all these things that I read recently (I just can't remember where).
hope this info can be used, and one last thing is that information on this subject can be found easily on the net, it's juest a matter of look for it, personally I like a lot an electronics web site: www.epanorama.net
thanks for the useful info and that link too
hmm today i got a miniSD topram, 2gb and it worked fine it was fat format i believe so i went to the winxp format utility and formated with fat32 16k everything seemed to work fine then i put it in the pda phone and nothing it did not see it, so then i put it back in the PC to format back to fat and nothing it does not see the card now at all
what happend i have been trying a million apps to some how force a format but none have worked, windows pretty much hangs while trying to read the card and at end says there is no media there, so do other apps
Low level format
losborn said:
I'm filing this information away for next time, though! Thanks again.
Click to expand...
Click to collapse
Low level format tool once done good job for me
http://www.killdisk.com/
I would proberbly say its fubarred, but you could try using software like SCAN DISK and carios other things.
Memory card fixes
Guys
We've seen this issue quite a bit lately.. Memory card simply locks up Windows when inserted.. It seems to be related to a flakey FAT table on the card. Formatting does nothing... Disk manager can't deal with it either..
The solution we found that worked was to use Paragon Partition Tools to remove the partition table on the card.. Recreate it.. then reformat..
Unless the card is physically cactus, it works every time..
Good luck!
Andy
www.pressdigital.com.au
Press Digital Support Team
???
any link for a free-ware partitioning tool !!!
wanna know more about erasing and recreating partition table on micro-sd cards
http://hddguru.com/download/software....2.36.1181.exe
Thank you, Luigi.
This work perfectly. My microSD 2GB was formated a 1GB and with this program now is all OK. I have microSD a 2GB again.
memory card recovery
This tool can help you to recover your files from damaged media.
www softorbits com/flash-drive-recovery
This device cannot be accessed because it is smaller than 65535 sectors.
:crying: It says "This device cannot be accessed because it is smaller than 65535 sectors" when I tried to low level format using LLFT.
---------- Post added at 07:31 PM ---------- Previous post was at 07:08 PM ----------
losborn said:
Thanks for all of the input! I tried formating it with my camera with no success, then took the easy way out: I took it back where I bought it and got it replaced.
I'm filing this information away for next time, though! Thanks again.
Click to expand...
Click to collapse
Good for you. But I'm still getting headache as I can't contact the manufacturer.
I had formatted the micro SD card in ext4 format for using with app2SD. I had it in 2 partitions.
And then after a while, the card stopped functioning (with so little and useless 30MB storage).
I had tried things like recovery, formatting, partition recovery.
Nothing can return it to original state. I just want it to be blank. It's ok I lost all the data.
I have a brand new Tab S 8.4, received today. I discovered that I cannot write to or erase the external SD card with 1 exception. I can only perform operations on the external SD card if 1) I do it via MTP from my laptop or 2) using Samsung built-in apps For example, I can copy/rename/delete/etc. files using Samsung's My Files app and I can save pictures from the camera to the external SD card.Most downloaded apps (like cameras, document editors, browsers, etc.) will not save to the external SD card. To be clear, I can copy and move files FROM the external SD card using apps such as ES File Explorer.
I tried reformatting the SD card, even tried other SD cards, always the same result. Is there something wrong with my device or the stock firmware? The tab is pretty useless to me without ability to write to the SD card and I don't really like being limited to the stock apps. So, is this something I can fix, that Samsung can fix, or do I have a lemon?
corvus.corax said:
I have a brand new Tab S 8.4, received today. I discovered that I cannot write to or erase the external SD card with 1 exception. I can only perform operations on the external SD card if 1) I do it via MTP from my laptop or 2) using Samsung built-in apps For example, I can copy/rename/delete/etc. files using Samsung's My Files app and I can save pictures from the camera to the external SD card.Most downloaded apps (like cameras, document editors, browsers, etc.) will not save to the external SD card. To be clear, I can copy and move files FROM the external SD card using apps such as ES File Explorer.
I tried reformatting the SD card, even tried other SD cards, always the same result. Is there something wrong with my device or the stock firmware? The tab is pretty useless to me without ability to write to the SD card and I don't really like being limited to the stock apps. So, is this something I can fix, that Samsung can fix, or do I have a lemon?
Click to expand...
Click to collapse
Plz, read the forum rules and use the search button....
boeser said:
Plz, read the forum rules and use the search button....
Click to expand...
Click to collapse
OK, did that. All I learned is that I have to root the tab which I hadn't planned on doing. Grrrrrr. Luckily, I am technical enough to do it, but most buyers are not. IMO Samsung should be pushing back hard on Google about this. It involves tens of millions of their customers, plus those of all the other manufacturers as well. These devices ain't cheap, so if I spend my money on one, I want it to work as expected with stock software. There's no point in Google singing the glories of KK and beyond if the OS doesn't do what a normal userI needs it too. When LG did its OTA update to KK for the G Pad 8.3, it allowed writing to the external SD, proving it can be done from the device provider.
it just not with samsung... the problem are with kitkat. so every device that use kitkat will have the same problem. LG/MOTO/TC/whatever android device also got the same problem. except some play smart and include the edited platform.xml into their device.
edan1979 said:
it just not with samsung... the problem are with kitkat. so every device that use kitkat will have the same problem. LG/MOTO/TC/whatever android device also got the same problem. except some play smart and include the edited platform.xml into their device.
Click to expand...
Click to collapse
At least via the Samsung-provided apps (camera, browser, file manager) it's possible to write to and erase from the external SD card. Still, it's a sad state of affairs this far into the Android game. And this business with tripping the knox counter when rooting really is annoying. I wonder what Apple offers these days ?
corvus.corax said:
I wonder what Apple offers these days ?
Click to expand...
Click to collapse
The same thing since they release the idevice. Lolz
Sent from my SM-T705 using Tapatalk
I have purchased a week ago a Galaxy Tab S 8.4 (T705M) and I am using a 64 Gb MicroSD in it.
I upgraded to 5.02 (OTA) since June/26.
I have problems with external MicroSD when the tablet is connected via USB to my PC (Windows 7, Home, 64 bits).
Whe trying to copy files from the PC to the tablet external MicroSD, the operation is very, very slow and some files (existing previously in the external MicroSD) disappear. Very annoying.
I had same problem with another Tab S I purchased by January and I returned it to the vendor. In that case, the tablet was on Kit Kat (as it is sold).
Yesterday, after the Tablet erases several directories from the SD, I turned off the tablet and extracted the SD. I tried to fix the SD directly connected to the PC but the SD appears as "read only".
After trying for a while I gave up and I formatted the SD (extFAT) and copy the info from a backup I did before putting the SD in the teeth (fangs?) of the tablet (yeah, I guessed the tablet would be as a wild beast when managing SD's). The "re"formatted microSD behaved as a charm, all info copied without any problem (but it took almost 3 hours copying 50 Gb at about 7 Mb/second).
On the other hand, I used this same SD card in my old Note 8 (Jellybean) for more than a year without problems.
Now, I guess the only way I have is extracting the SD card and edit its content only connecting it directly to a PC.
What can I do to calm down the beast and edit external MicroSD connecting the tablet via USB without losing information and with a reasonable speed ?
Any suggestion ?
Root your device and apply the sd card fix. Also 7mb/s seems about normal for a cheap micro sd card.
I have not had any problems with files disappearing, have you confirmed your 64gb microsd is not a fake.
I have a Samsung 64gb microsd, and i got around 9MB/s copying a movie from my notebook to my T800 10.5"
John.
Thanks for the comments.
My card is Verbatim Class 10 and it worked perfectly in my old Note 8. It works really as stated for a class 10 SD (10 MB/s at peaks as stated in https://www.sdcard.org/developers/overview/speed_class/) but, as with any device, speed depends on several factors (file sizes, buffer in the source PC, etc) and the average obtained is really about 7 MB/s or so.
I guess the problem is related with something in Lollipop (but Tinderbox says has no problems) or, more probable, driver in the PC.
Tinderbox, are you using Kies to transfer ? are you transferring from a PC or a Mac ? which class is your SD ? have you enabled "USB debugging" ?
I purchased an 8 GB SD in order to make some tests. This SD is Class 4 and formatted FAT32 but anyway I will test it to learn about this riddle....
In the mean time, any suggestions are welcome and I repeat, thanks for the answers.
UPDATE:
Sandisk SD (8 GB, FAT32) worked perfectly, no erases, good speed (Class 4, speed tablet connected via USB about 4 MB/s).
Next test planned: reformat Verbatim 64 GB using FAT32.
I am on kitkat 4.4.2 and i dont use kies, I just drag and drop my files from my notebook to the tablet, I did not need to enable usb debugging, my 64gb is full of video, I copy them virtually every day and have had not problems.
I think i read about another 8.4" owner having problems with his microsd card i will have a look for it.
I have only ever bought Samsung memory cards for years and i have never had a problem.
Have you tried re-installing the device driver, you can do it from the kies menu.
John.
Tinderbox (UK) said:
I am on kitkat 4.4.2 and i dont use kies, I just drag and drop my files from my notebook to the tablet, I did not need to enable usb debugging, my 64gb is full of video, I copy them virtually every day and have had not problems.
I think i read about another 8.4" owner having problems with his microsd card i will have a look for it.
I have only ever bought Samsung memory cards for years and i have never had a problem.
Have you tried re-installing the device driver, you can do it from the kies menu.
John.
Click to expand...
Click to collapse
Thanks for your complete answer(s).
I have made several (a lot) of tests without any success. In all cases SD can not be written from a PC (when connected via USB) and erasing files using android app sometimes cause corruption.
The card is completely readable (a little laggy to begin to work after it was unmounted and reinserted). The card works without errors when connected directly to the PC.
These are the some tests I have made (reformatting and restoring the files between one test and the next, a real nightmare ):
1. Uninstalling Kies
2. Reinstalling Kies (and refreshing driver)
3. Uninstalling Kies and Samsung driver. Uninstalling USB driver and erasing it completely and let windows select the driver
4. Formatting the card in FAT32 via some software
5. Trying to format the card via command in windows (from the console). It takes about one hour and abort near the end with an error messages explaining that windows can not format FAT32 for this capacity
6. Even trying to partition the SD via DISKPART. I can create one primary partition (32000 MB) but DISKPART shows all disk allocated and do not allow to create another partition (either primary or extended)
Last symptom: I erased one file from the root directory of the SD using "My files" (the app preinstalled in the firmware by Samsung). The file disappear but My files shows a ghost file named with special characters.
When the SD is consulted via Root Explorer (an android file manager) or even connected directly to the PC, the ghost file did not show.
@tinderbox: could you remember who (or where do you read about) the other " 8.4" owner having problems with his microsd card " ?
Some body could suggest solution ?
Thanks for any help or guide.
Hi.
You did format the micosd card using the tablet, you cannot format on an computer and then use it in your tablet, the tablet uses it own file system, so you have to format the microsd using the tablet.
John.
Format the card to exFat in windows. It only takes a few seconds to format my Samsung Evo 64gb.
If it doesn't work then your card likely has issues.
Finally success
Thanks for your suggestions.
I tried almost everything:
1. Formatting FAT32
2. Reformatting in the tablet
3. Reformatting in the PC
4. Even formatting using a software from Verbatim website
The problem persists: SD Card is not editable (delete files, write files, edit files) when inserted in the tablet. SD works perfectly in the PC.
Finally I purchased another SD 64 Gb Toshiba Class 10. The SD package says it can work at 40 Mb/sec. The card write at 10 Mb/sec but it reads faster.
This Toshiba card works perfectly. I can erase or move files using android file manager (My Files app), I can write from the PC using tablet connected via USB to the PC. I can create files directly in the tablet (I used Jota+ to create a text file).
Verbatim card and Toshiba card specs seem identical, except by the speed claimed in the Toshiba package. There is some difference I am missing but definitively these cards are not equal (something in the card data bus ?)
I repeat, thanks to everybody who tried to help.
I only ever buy Samsung memory cards for years, and i test every one for errors and i have never found any, And if an Samsung memory card does not work in an Samsung tablet, well it is not going to happen, but people go for the cheap alternative.
John.
Hi there,
I recently got an M2-802l. I'm already hitting the limits of the internal storage so I've started moving apps to the sdcard I've inserted into the device. I have a few queries about this...
1) what are the best (most compatible) sdcards people are using with their M2's?
2) I'm seeing a little sdcard error icon in the system menu. I've no idea where to check this. It's not appearing (in any obvious location) under storage. (I'm using a Sandisk Extreme pro)
3) If I resolve this sdcard error - is it possible to enable use SD as internal? I can't see the option anywhere. I can set sdcard as default. But I don't think that's the same.
Thanks in advance for any replies!
I am using the SanDisk 200GB SDCard I got from my LG V10 Promotion....working fine so far. As for #2, can you post a screen shot? #3, I am not able to find the enable SD CARD as internal storage. Huawei probably removed it. Might need to flash a custom ROM with Stock Nougat to see that option.
RE : MediaPad M2 - SDCard questions
richfort said:
Hi there,
I recently got an M2-802l. I'm already hitting the limits of the internal storage so I've started moving apps to the sdcard I've inserted into the device. I have a few queries about this...
1) what are the best (most compatible) sdcards people are using with their M2's?
2) I'm seeing a little sdcard error icon in the system menu. I've no idea where to check this. It's not appearing (in any obvious location) under storage. (I'm using a Sandisk Extreme pro)
3) If I resolve this sdcard error - is it possible to enable use SD as internal? I can't see the option anywhere. I can set sdcard as default. But I don't think that's the same.
Thanks in advance for any replies!
Click to expand...
Click to collapse
Hello richfort,
Officially these types of SD Cards are compatible with M2 8.0 models :
microSD
microSDHC
microSDXC
with sizes that can vary from the 1-2-4-8 GB up to 256 GB.
I have several noName, Samsung and SanDisk SD cards tested / used on the tablet without any issues so far (Samsung 32GB Evo Plus (SDHC), Samsung 128GB Evo Plus (SDXC), TDK 16GB (SDHC), SanDisk 64GB Ultra (SDXC), Integral 64GB (SDXC), etc..)
You can also use the famous Dual USB 3.0 (OTG or not) Flash Drives, depending on usage and type of activities you do with. Myself, I've never tested those with my tablet.
Concerning, the error you have, try to test another SD-Card, not PRO model, and see it the same happens.
Also, from technical point of view, SD and Internal storage are 2 different type of storage. Never tested neither but maybe the "Secure Folder" might be the answer you're looking for.
Otherwise, I would advise to leave the things as default, just be sure that SD Card is the default storage for all pictures, videos, data, caches, and related activities and needs.
Hope this helps anyhow.
Have a nice day.
Kind Regards.
After attempting to format as internal using the preinstalled files app, my SD card is no longer recognized by my device…
I believe it is now completely corrupt, as even Windows is unable to read it after attempting to use an SD card adapter. It's not even listed in the disk management program…
Please help as i was dependent on my sd card as i only have 16gb on this device...
Use a low level formatting app to make it readable again.
You can also try accessing it directly* in Windows>Disk management, scan for new devices option.
Windows however may not be able to format it as it has been corrupted.
I don't recommend using the SD card like that; it's bandwidth is much slower than the internal memory and will noticeably slow down the device. If possible put all data on the SD card, only apps and maybe the download folder go on internal memory.
*this is the best way to access drives. You can do transfers directly from this Window to/from other drives.
blackhawk said:
Use a low-level formatting app to make it readable again.
You can also try accessing it directly in Windows > Disk management, scanning for new devices option.
Windows, however, may not be able to format it as it has been corrupted.
I don't recommend using the SD card like that; its bandwidth is much slower than the internal memory and will noticeably slow down the device. If possible, put all the data on the SD card. Only apps and maybe the download folder go on the internal memory.
This is the best way to access drives. You can do transfers directly from this window to/from other drives.
Click to expand...
Click to collapse
The issue is that it does not appear in disk management at all, so I can't do anything you suggest. What is a low-level formatting app, and what does it do?
As I previously stated, I attempted to make my SD card internal storage because apps would not move to the SD card even after rooting the device and using app2sd. Using app2sd simply redirected me to the app options page, where I was told to go to storage and move to the SD card, despite the fact that there was no such option. This "not finding move to SD card" issue is unique to the Crdroid; in stock ROM, it worked flawlessly.
If the file structure gets corrupted it can render the card unreadable.
Go the the card manufacturer to see if they a low level formatting utility. Here's some more , but I haven't used them, scan download with online Virustotal first to be safe. Lexar may have one it's a memory recovery app but it probably low level formats.
I never saw a card get so corrupted that you couldn't see on Disk Management. It may be DOA.
Check Event Viewer for error messages but first reboot and try another PC port.
Check the driver in hardware management, try to update it or roll it back.
blackhawk said:
If the file structure gets corrupted, it can render the card unreadable.
Go to the card manufacturer to see if they have a low-level formatting utility. Here's some more , but I haven't used them. Scan them with online Virustotal first to be safe. Lexar may have one. It's a memory recovery app, but it's probably low level formats.
I never saw a card get so corrupted that you couldn't see it on disk management. It may be DOA.
Check Event Viewer for error messages, but first reboot and try another PC port.
Check the driver in hardware management, try to update it or roll it back.
Click to expand...
Click to collapse
If by DOA u mean is dead on arrival, it worked flawlessly before this. I have a SanDisk device. I'll try the formatting utility. Furthermore, I'm pretty sure the file structure is unreadable, and it is now fully corrupted…
Coming to think about it, i remember getting a Java error or something, but it was one of the disappearing notifs that appear at the bottom of the screen so i couldn't capture it…
thaynos said:
If by DOA u mean is dead on arrival, it worked flawlessly before this. I have a SanDisk device. I'll try the formatting utility. Furthermore, I'm pretty sure the file structure is unreadable, and it is now fully corrupted…
Coming to think about it, i remember getting a Java error or something, but it was one of the disappearing notifs that appear at the bottom of the screen so i couldn't capture it…
Click to expand...
Click to collapse
Try another card. If you can recover the victim card depends on if failure is hardware related.
Cards normally don't spontaneously go corrupt* so at this point even if you do recover it, I wouldn't trust it.
Once I have a SD card in a phone I leave it there and only access through the phone. Always format a new card in the phone before using.
Cards can be damaged by ESD, static electricity.
Avoid touching its contacts. On dry days touch an earth ground immediately before handling the card. If damaged by ESD it may manifest itself immediately or days, weeks or even years latter.
While they have some internal ESD protection it's limited, so a big enough charge or repeated ESD insults can destroy it.
This is the biggest threat to flash memory. Near lightning strikes can also destroy them by magnetic and/or capacitive induction.
*Don't share use in other devices like cams without formatting in that device first. That can cause file corruption.
blackhawk said:
Try another card. If you can recover the victim card depends on if failure is hardware related.
Cards normally don't spontaneously go corrupt* so at this point even if you do recover it, I wouldn't trust it.
Once I have a SD card in a phone I leave it there and only access through the phone. Always format a new card in the phone before using.
Cards can be damaged by ESD, static electricity.
Avoid touching its contacts. On dry days touch an earth ground immediately before handling the card. If damaged by ESD it may manifest itself immediately or days, weeks or even years latter.
While they have some internal ESD protection it's limited, so a big enough charge or repeated ESD insults can destroy it.
This is the biggest threat to flash memory. Near lightning strikes can also destroy them by magnetic and/or capacitive induction.
*Don't share use in other devices like cams without formatting in that device first. That can cause file corruption.
Click to expand...
Click to collapse
the point of asking for advice is cuz i dont have another card
try InitDisk