Develop Bugs

Do i NEED a Class 6 Micro SDHC Card

Hello all,
Ive got a spare 16GB Micro SDHC card which i have swapped for the stock 2GB version that came with the Desire, but it is only a Class 2.
Having read that its best to use Class 6, should i shell out £50 for a new one, or will i not notice a difference in class ?

Dunno - I'm using a class 2 16gb card myself and I don't notice much slowdown if at all. I'm surprised these things haven't come down in price after two years... key thing is do you notice any slowdown with apps that access the SD card? like I say, I haven't thus far...
Sent from my HTC Desire using the XDA mobile application powered by Tapatalk

i read somwhere that class 4 is enough coz the phones do not support hihger speeds. class 6 will help you if you will take card to the card reader straight to the computer... it think

hot-fuzz said:
... Having read that its best to use Class 6 ...
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Where have you read that, please?

tomeeq12 said:
i read somwhere that class 4 is enough coz the phones do not support hihger speeds. class 6 will help you if you will take card to the card reader straight to the computer... it think
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Thats what i ......... think. Im sure it only matters if its connected to the PC, and in that case i dont care.
I read it on another forum that i wont link too
Class 6 are almost double the price of Class 2.

You don't NEED to get one, I did use a Class 2 card for a few days and didn't have any problems.
Personally I am using a Class 6 now, as I regularly transfer a lot of big media files onto the card, so the extra speed is worth it for me.
If you don't fancy forking out though, you don't have to.

I totally agree, My desire came with a 4gb sandisk class memory card which I initially assumed was class 4 until I took the card out yesterday...connecting the desire to my pc and switching to usb drive mode, i am able to transfer my movies etc to the memory at +/- 8Meg per sec which is more than adequate enough for me...I was about to get a 16gb one but was thinking of getting the class 6 one until i discovered the one I currently have is class 2, so I just made up my mind and went for a class 2 16gb, saved me money....

They only refer to the write speed of the card, i came from a 8gb class 6 and now have a 16gb class 2 and notice no difference, only difference is the write speed from pc to card.
Even though i got a class 2 i still see 4-6mb/s so happy enough with that.

I have a class 10 16Gb card in phone. Read and write speeds seem to be limited to around 8Mb per second (copying uncompressed music). Using an adapter, the computer is able to copy at 14Mb+ using the same card.

They just seem a big outlay for nothing to me, lets face it the only big write time is when you transfer everything across from your previous card once the stuff is on there the write times really won't be much of a problem.

The main reason you will find people suggesting class 6 and above SD cards is due to "Apps to SD". For the Newbies "Apps to SD" or A2SD is a modification that has been done on most android phones (though not the desire at time of writing) which allows the Apps you download to be stored on the SD card rather than the phones limited internal memory. I am not sure if it makes a huge difference to the faster processor phones, but in the G1 days it was noticeable. For just moving music and pictures about it isn't really important to have a faster card and we may have to wait a while for A2SD anyway. I will pop over to the N1 forum and see if they can shed some light on this.

Anyone using a microSD 16GB Class 4, if so are they any good? I'm looking at buying one for the Desire. Also where's the best place to get a deal on one of these card?

What MicroSD Classes Work with the Desire...?

My question was concerning my 16gb Class 6 card (which actually appeared to be corrupt/broke'd anyway)
I asked about compatibly with the Desire...
htc said:
Thank you for contacting us.
In regards to SD Cards
I can help you with that.
The card that you are trying to use is not compatible with the phone as the class is too high speed for the device to be able to keep up with the speed. I have included a link to a webpage with the sd cards that are compatible with that device.
http://www.expansys.com/a.aspx?i=196001
If you look under the accessory tab then down the bottom is compatible memory.
I trust that this resolves your query, please do not hesitate to contact us again if required.
To send a reply to this message or let me know I have successfully answered your question log in to our ContactUs site using your email address and your ticket number XXXXXXXXXXXXXX.
Sincerely,
HTC
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I'm sure I read some threads about class 10's working fine in the Desire?
The link seems to suggest only a class 2 or a class 4 will work...

I'm using a class 4 without problems so far.
On a dutch board I read a guy was using a class 6 on Starbust so it should be possible I think.

I've just bought a 16gb class 4 Sandisk and the speed tests show it as being quite a bit faster than my class 4 (non Sandisk) 8gb card!

I'm using class 4, working fine

I'm using a 8GB class 6 card with Custom ROM and A2SD with no problem. Been over 6 months now.

A lot of class 10 cards have issues, class 6 seems to be the most reliable thus far. Some people have had good experiences with A-DATA 16gb class 10.

So from user experience - a good Class 6/10 card should work just fine?

Lothaen said:
So from user experience - a good Class 6/10 card should work just fine?
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Yes, it should. Have no problems, with mine

Lothaen said:
So from user experience - a good Class 6/10 card should work just fine?
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For C6 yes.
For C10 Mostly yes... but usually class 10 is not really faster... so save the money.
Just my two cents.

I'm using Transcend 8GB class 6 without any problem. Try to format by gparted or similiar. Are you using it for any other purpose than storing photos, music or etc? For example for data2sd or apps2sd?

I just bought a transcend 16gb class 6, working perfectly so far with no problems.
Sent from my HTC Desire using XDA App

Bartyzel said:
I'm using Transcend 8GB class 6 without any problem. Try to format by gparted or similiar. Are you using it for any other purpose than storing photos, music or etc? For example for data2sd or apps2sd?
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I bought a 16gb class 6 to use with data2sd but struggled as the card was broken - so i've sent it back and just have the 8gb class 2 that i got with my phone now - and on stock rom again, so it is just photos and music and froyo app2sd at the moment

basically all branded cards will work fine, the thing you shoud be concerned more onthe capacity you are gonna use. It aint worth buying a 16GB sd when u cant fill even half of it with useful stuff

If speed is your thing then get a class 4 or 6 but I had SD mounted as read only with a class 4 8 gig Kingston SD, so I swooped with a buddy of mine for a class 2 SD from a Nokia n95, no problems since then.
Sent from my HTC Desire using XDA App

Is class 10 SD card necessary?

From what I understand I would need the class 10 card if I want to record HD video. If I am not going to record video can I get away with class 4?
Thanks for any help!

You do not need a class 10 to record HD Video, a class 4 does the job perfectly well. I had a 32GB class 4 sandisk and it was fine.

I've heard that for smartphones, Class 10 is even worse than lower classes.
That's because class 10 has fast block reading speeding. The problem is that it comes at a price of slow random access reading. If you want to play high bitrate movies from the SD card, higher class will be better for sure. However for day-to-day usage, lower class might make the phone feel faster.

tarsierspectra said:
From what I understand I would need the class 10 card if I want to record HD video. If I am not going to record video can I get away with class 4?
Thanks for any help!
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class 4 is good enough for video recording.
iirc, 1080p video on the note is recorded at a bitrate of around 17mbps or so. convert that from bits to bytes and its something like 2.125mb/s minimum required to record videos at 1080p. so anything higher than a class 2 should be fine for playback and recording (unless you encode at a silly bitrate).
the only time i could see anyone really needing the faster class speed would be if you wanted to take 8mp shots in rapid succession. depending on the colour tone of the image you intend to take, the file size can go up to 3mb. at that point, your photos per second will be limited by the speed of your memory card. ie. class 4 = 1 photo per second, class 6 = 2 photos per second, class 10 = 3 photos per second maximum.

Be careful in stores. Went to best buy last night for SD card. Class 4 cards only in phone section but at class 10 price from camera section. Also shelf had classes mixed up only sorted by gb. So pay attention to what your getting
Sent from my SAMSUNG-SGH-I777 using XDA App

Whelp, I know that my bullcrap cheapo Lexar "class 10" wont allow me to record to it directly.
Man.. I'm pissed. time to look for a new one.

Hope a Samsung 32GB c10 I am thinking of buying will be ok on a SAMSUNG device...

microSD Class 10
What about if you will move (apps2SD) games like Sentinel (TD game) in the microSD, is it necessary to go for c10?
I'm confused on what to buy, c4 or c10.
Need your help!

For me it is. copying movies from PC to my SD card is just painful on class4.
I see that some good class10 cards can write at 20mb/s (sequential), which is 5 times as fast as my current class4 sandisk (4.1mb/s).
The only thing that is holding me back is the price. Once the price comes down a bit ill definitely grab a c10 kingston 32gb.

What about for games you move to your external sd card? Will performance decrease with a c4? Much better with c10?
What can you say about the Ridata 32gb class 10? Is it any good compared to transcend or kingston or sandisk?
Sent from my GT-N7000 using Tapatalk

allansy said:
What about for games you move to your external sd card? Will performance decrease with a c4? Much better with c10?
What can you say about the Ridata 32gb class 10? Is it any good compared to transcend or kingston or sandisk?
Sent from my GT-N7000 using Tapatalk
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Dont know about games, I doubt c10 will make a difference at all....but dont mark my words
As for brand you should look at the particular model rather than judging by just the brand. For instance the sandisk mobile ultra (class 4) beats many of the other class10 cards
check this link
http://www.tomshardware.com/reviews/microsdhc-memory-card-performance,3011.html

Amazon
I managed to get a class 10 32 gig for about £25. Currently they are very cheap so it might be worth getting it either way.

Poncho_D said:
I managed to get a class 10 32 gig for about £25. Currently they are very cheap so it might be worth getting it either way.
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When I switched from a class4 32GB sandisk to a class10 32GB Lexar, I noticed the smartphone working faster and snappier, probably APP2SD in gingerbread and pictures and videos in the gallery has something to do with that change in response.
In my experience with memory cards and professional equipment, not only we shall choose for class ratings, but also for trusted brands, like sandisk, lexar and transcend.
To sum up, class10 is better than class4, and if the diference in price is not very high, totally worth it, but, there is a lot more difference in daily use between a galaxy note and a HTC Desire.

Class 10 is for marketing, it's totally not needed for smartphone with internal memcard.

You might want to read this thread on why class 4 is better suited for smartphone use.
http://forum.xda-developers.com/showpost.php?p=14456360&postcount=42

Currently using a Class 4 Sandisk 32gb card. Am very satisfied with the performance.

AdoreMe said:
Currently using a Class 4 Sandisk 32gb card. Am very satisfied with the performance.
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Same here
Sent from my GT-N7000 using xda premium

(NOOB ALERT)
Can someone answer the following question which 32gb SD card is best for Samsung Galaxy Note in terms of performance?
Assuming there is one simple answer
Would appreciated a direct link to say Amazon product page.
Appreciated any help as it saves me annoying people by opening a new thread

Sandisk 16/32GB Mobile Ultra
Guys!
What can you say about Sandisk's Mobile Ultra microSD cards? I'm planning to buy this sdcard instead of class10 microsd cards.
Thanks!

allansy said:
Guys!
What can you say about Sandisk's Mobile Ultra microSD cards? I'm planning to buy this sdcard instead of class10 microsd cards.
Thanks!
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probably the best , but superexpensive

[Q] 16GB class 2 vs. 32 GB class 4

I currently have 16 GB class 2, and i am about to but 32GB class 4.
what is the diffrences beetween them ?
The games will work smother with class 4?

I have a 32 GB class 10 micro sd card, bit I didn't really notice any difference in speed compared to the 8 GB class 2 micro sd that came with the phone...
Sent from my R800i using XDA

The class rating of an Sd card is based of off its Write speed. So a 16gb class 2 would write at 2mb per second, the 32 gb class 4 will be able to write at 4mb per second, There is a slight "catch" however when using larger storage Sd cards, its been explained to me in the past that when you go up in storage it takes the device (phone, pc, camera ect.) longer periods of time to initially read the card itself because its now reading through more storage space then before (even if that space is empty in places).
With that in mind, the 32gb class 4 will Write files to it self at a faster speed then the 16gb class 2, but it will take your phone longer periods of time to access the information on the larger Gb card, so will games play smoother off your Sd card, technically no, they wont. But what you will achieve are faster data transfer rates when moving files to and from.
Also take into account that the class rating system isnt exactly perfect. For instance my 32gb class 4 is rated to write at 4mb per second, but its achieved 6mb per second depending on the files, and Im currently using a 32gb class 10 which most of the time writes data at 12mb per second.
I hope this helps

I think the best would be those samsung or sandisk ultra class6 cards.

julianpaul said:
I think the best would be those samsung or sandisk ultra class6 cards.
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I'm using a Samsung 32gb class10 "high speed series" as marketed per Samsung, it works very well. But what works for me isn't always for everyone
Sent from my R800x on CM9

I just bought one of these a couple weeks ago, it was $29.95 free shipping but its still a great price and its getting consecutaively around 7-8mbps. I replaced my 32gb Sandisk class 4 with it... I had the $$ and figured why not.
http://www.adorama.com/IDSMUMSD32G....ate&utm_campaign=Other&utm_source=rflaid62905

Why don't you just bought class 10 SD card..?
How much the price different between class 4 and class 10 btw...?

I dont wanna start a you know what measuring contest here but . . .
Samsung "High Speed Series" I bought from ebay 38$
http://www.ebay.com/itm/Samsung-32G...gital_Camera_Memory_Cards&hash=item2c61981fc1
10-12 mb's per second
Even though Samsung it's selling for 80$ direct from manufcaturer, heres the specs link from their site
http://www.samsung.com/us/computer/memory-storage/MB-MSBGA/US-specs

OK!!! Thanks

dhani88_TotallyNooob said:
Why don't you just bought class 10 SD card..?
How much the price different between class 4 and class 10 btw...?
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There was some other thread around where people found that class10 cards had higher latency and slower access times than the class4 ones. So they're not really suited for mobile phones where quick data access is more important than high transfer rates.

julianpaul said:
There was some other thread around where people found that class10 cards had higher latency and slower access times than the class4 ones. So they're not really suited for mobile phones where quick data access is more important than high transfer rates.
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I still believe storage size has a greater effect on access time then the class rating, classes are read/write speeds but more space takes longer time to read. The class itself being suitable, depends more upon the manufacturer of the sd card, and the manufacturer of the device and the device its being used in. A 4gb class10 is going to give you great performance in your device where as a 32gb class10 will indeed function a little slower but depends if you need all that space or not. I'm no expert but that has been my experience.
Sent from my R800x using CM9

jgregoryj1 said:
I just bought one of these a couple weeks ago, it was $29.95 free shipping but its still a great price and its getting consecutaively around 7-8mbps. I replaced my 32gb Sandisk class 4 with it... I had the $$ and figured why not.
http://www.adorama.com/IDSMUMSD32G....ate&utm_campaign=Other&utm_source=rflaid62905
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Click to collapse
Yeah, I have that card too and it's a big improvement from my prior 16GB class2 Sandisk card

I have my 32gb class 4 sandisk on my xperia. So far so good with games.
Sent from my R800i using XDA

I've got a sandisk 32 gb class 4 and I tried out my bros class 10 32 gb, can't remember what make it was but damn is that thing fast read/ write speeds are great and playing games is cherry pie
Sent from my R800a using XDA App

Would it hurt an sd card to bump up the read/write speed beyond what the card is rated for?
Sent from my R800x using Tapatalk 2

beez1717 said:
Would it hurt an sd card to bump up the read/write speed beyond what the card is rated for?
Sent from my R800x using Tapatalk 2
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Click to collapse
It will decrease its "lifespan" but probably won't kill it, I think the apps2sd script bumps things up drastically and I didn't have any troubles for the while I was using it, but the SD card manufacturer and its class might have some effects on the bumped up lifespan .. probably good to at least make sure you have a spare!
Sent from my R800x using xda premium

I indeed have a spare one that I am using in my OG droid. Lol. I use that phone as an ipod touch like device. Too bad I don't have a sim card because I'm on cdma. If I were, then I could use my OG droid when I want to use a slimmer phone that has a physical keyboard. However, SwiftKey has me not missing my physical keyboard.
Sent from my R800x using Tapatalk 2

has anyone try Sandisk Ultra MicroSDXC1 UHS-1 64GB?

is playing HD games use Sandisk Ultra MicroSDXC1 UHS-1 64GB lagging?
thanks

Im not sure if i have the exact model as you, but i do have a class 10 64gb micro sd ultra from sandisk, it has red and grey colours on the card...
i have not noticed any lag, or any performance issue from using this card, i have alot of apps moved to sd via "pm setInstallLocation 2" and there is no difference from my old 16gb micro sd class 6
Also, i have only got 2gb of free space on my card, it i full of games, roms, music etc etc and even finding files, playing music, normal browsing etc etc there is just no performance issues
I too tjought that such a big card would cause some sort of problems, but i am pleased to say that the card is just amazing

spikerosoft said:
Im not sure if i have the exact model as you, but i do have a class 10 64gb micro sd ultra from sandisk, it has red and grey colours on the card...
i have not noticed any lag, or any performance issue from using this card, i have alot of apps moved to sd via "pm setInstallLocation 2" and there is no difference from my old 16gb micro sd class 6
Also, i have only got 2gb of free space on my card, it i full of games, roms, music etc etc and even finding files, playing music, normal browsing etc etc there is just no performance issues
I too tjought that such a big card would cause some sort of problems, but i am pleased to say that the card is just amazing
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I'm pretty sure SanDisk doesn't have a class 10... Never mind I guess they do

You want a class 6 Sandisk. Make sure you know the difference between read and write speeds between the different classes of the micro sd cards.

jacklebott said:
I'm pretty sure SanDisk doesn't have a class 10...
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Click to collapse
http://www.play.com/Mobiles/Mobile/4-/31619605/-/Product.html
They do

I have the exact same card for over a month and this thing is awesome. Its got a ton of storage, 64gb, and is very fast (Class 6 but reads/writes at 33mbps/7-9mbps
I paid $49 for mine on slickdeals.net several weeks ago and really and pleased with this card. Totally worth the price

Runadumb said:
http://www.play.com/Mobiles/Mobile/4-/31619605/-/Product.html
They do
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Ah indeed they do, they must've added that after I had gotten my card, as they only had class 6 at that time

Sony splat has an older chipset that cannot benefit from class 10 SD card, stop throwing good money on stuff that don't offer any speed advantage.
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