Develop Bugs

[Q] Question on MicroSD speeds

Can anyone comment yet on the speeds they are getting with their internal microsd cards for read and write?
I would like to see if it is worth splashing out on an expensive high speed card, or because it is running USB2 that in real terms it is crippled to about 20MBps read/write. It would be a pitty if the speeds are crappy, as samsung is making some pretty sweet microsd cards these days.
Regards

hardjards said:
Can anyone comment yet on the speeds they are getting with their internal microsd cards for read and write?
I would like to see if it is worth splashing out on an expensive high speed card, or because it is running USB2 that in real terms it is crippled to about 20MBps read/write. It would be a pitty if the speeds are crappy, as samsung is making some pretty sweet microsd cards these days.
Click to expand...
Click to collapse
Afaik, sd card doesn't use the usb bus.
I have a cheap 64GB microsd and it gives 40/18mbps on the 8.4 pro on a1 sd bench tests

ssuper2k said:
Afaik, sd card doesn't use the usb bus.
I have a cheap 64GB microsd and it gives 40/18mbps on the 8.4 pro on a1 sd bench tests
Click to expand...
Click to collapse
Thank you very much Ssuper2k. That is good to know if you are getting decent speeds on a cheap 64GB microsd. Anyone got any high rated SD cards share any light on what it tops out at ?
Thanks again.

hardjards said:
Thank you very much Ssuper2k. That is good to know if you are getting decent speeds on a cheap 64GB microsd. Anyone got any high rated SD cards share any light on what it tops out at ?
Thanks again.
Click to expand...
Click to collapse
Heres mine... Sandisk 64GB Class 10

BossJ said:
Heres mine... Sandisk 64GB Class 10
Click to expand...
Click to collapse
That is not the SD card...
My g.skill 64GB class 10 benchmarks around 44MB/sec read, 14 write. It cost $25.

Skitals said:
That is not the SD card...
My g.skill 64GB class 10 benchmarks around 44MB/sec read, 14 write. It cost $25.
Click to expand...
Click to collapse
ooops. you are right... a1 sd bench labels it wrong. It says Internal SD card as my external and my internal as my external. (Sorry)
Here's my new results - reading 40 MB/sec 14 MB/s write..
Once again - sorry about that.

Guys, when you say Class 10 you aren't really speaking to the speed of the card. There is a wide range of speeds in cards that are all rated as class 10. Samsung has some that are 90 read and 80 write for example and most only advertise as 30 read and don't even say their write. Anyone have one of Samsung's good 90/50 or 90/80 cards they have tested?

I have just benchmarked a 64GB Samsung Pro MicroSDXC card (rated at 90MB/s read, 80MB/s write). In a USB 3.0 card reader on my computer it writes at around 65MB/s average and reads at upwards of 80MB/s.
In the Tab S 8.4 (Wi-Fi only model) it benchmarks at 49.53MB/s read and 24.53MB/s write in A1 SD Bench

So what would anyone say... Is the best card for this particular device? Any recommendations?

If you're not planning on taking the MicroSD card out of the tablet in order to transfer content onto it, then you might as well just go for a mid-range card as it will be limited by USB 2.0 transfer speeds anyway. I'd say the Samsung Evo or the old Samsung Pro card would be fine depending on pricing.

I dont plan on taking it out. Since the above Benchmade had the pro at 49.53MB/s read. I feel It's just going to be overkill. Since its not getting the full 90 MB/s read 80MB/s write. I'm thinking the Evo should suffice. What are your thoughts?

I meant the old Pro model, which I think was 70MB/s Read - 20MB/s write, these can sometimes be had for similar money as the new Evo. I think you'd be fine with either of those, or even the Plus model. I think the Samsung MicroSDs are fairly reliable in general.

So nobody knows if Tab S has standard bus, high speed bus or Ultra High Speed Bus UHS-I or UHS-II?
I think that micro SD card Class 10 U3 guarantees minimum 30MB/s. So it supports even 4K recording...
But I still don't know if it is worth of a lot of money. If benchmarks are true - Tab S has UHS (your 45MB/s). If!

bus speeds
belek1979 said:
So nobody knows if Tab S has standard bus, high speed bus or Ultra High Speed Bus UHS-I or UHS-II?
I think that micro SD card Class 10 U3 guarantees minimum 30MB/s. So it supports even 4K recording...
But I still don't know if it is worth of a lot of money. If benchmarks are true - Tab S has UHS (your 45MB/s). If!
Click to expand...
Click to collapse
According to Samsung support, the Tab S micro SD speeds is limited by the USB 2.0 bus, or 60 MB/s. So that would imply UHS, though the 90MB/s cards would not get the full speed. I would like to see someone test a 90MB/s card and see what the results are. Probably just going to go with a 48MB/s card if there isn't any difference. Though I think write speeds are significantly different between the higher speed UHS-I cards and the lower speed ones (50 vs 10 MB/s write I think).
If anyone has a couple cards and a Tab S they can test with, I would love to see the results.

So I bought a UHS-3 SD Card for my G3. Overkill?

Hi
I bought a SanDisk Extreme UHS-3 SD Card out of impulse today.
I'm unsure if the G3 has enough bandwidth to deal with it.
Has anyone bought a UHS-3 SD Card and is using on his G3?
Tapatalked thru my LG G3

Bump
Nobody tried? Couldn't find any info either
Tapatalked thru my LG G3

I am using a 64gb Sandisk extreme UHS-I U3 (UHS Level 3) card. Seems to work fine. I don't understand what issue you were logically expecting to experience.

gandalf_grey91 said:
I am using a 64gb Sandisk extreme UHS-I U3 (UHS Level 3) card. Seems to work fine. I don't understand what issue you were logically expecting to experience.
Click to expand...
Click to collapse
Improved speeds etc. I thought about using MultiROM on it.. Could you please run A1 SD bench and post the results?
I'm getting pretty much the same card as you

GTMoraes said:
Improved speeds etc. I thought about using MultiROM on it.. Could you please run A1 SD bench and post the results?
I'm getting pretty much the same card as you
Click to expand...
Click to collapse
Read 67.05MB/s Write 31.64MB/s

gandalf_grey91 said:
Read 67.05MB/s Write 31.64MB/s
Click to expand...
Click to collapse
Write speed looks very good, but read is disappointing...
thanks! But it seems that the G3 is limited to UHS-I =/

I am getting 38.44 and 20.03 only for samsung evo uhs 1 I guess your result is pretty good

Zenroid said:
I am getting 38.44 and 20.03 only for samsung evo uhs 1 I guess your result is pretty good
Click to expand...
Click to collapse
I'm using a Samsung Class 10 SD Card. Terrible 44.34MB/s read and 17.38MB/s write, default benchmark
Using the Precise Benchmark, I'm getting 59.7MB/s read and 19.22MB/s write. It's too bad.
In comparison, I'm getting 183.92MB/s read and 38.7MB/s write on the internal memory (precise benchmark, with reboot)
I expected somewhere near the internal memory read speeds with the Sandisk extreme, but at least there's the decent write speed.
I wanted to run some ROMs on the memory card, but with those read speeds, it doesn't seem feasible.
Or perhaps the G3 internal memory is just absurdly fast. I'll try with some other devices around my home
---
Funny. The Galaxy S4 Mini here has slower internal memory than my Class 10 SD Card. But still, if I install Android on my SD Card, it'll be as slow as taking 10~20 seconds to open a simple app.
I don't get it

gandalf_grey91 said:
Read 67.05MB/s Write 31.64MB/s
Click to expand...
Click to collapse
Just received my UHS-3 card.
Pretty disappointed by the read speeds.
I was getting ~65MB/s read and ~14MB/s write.
The SanDisk Extreme is giving me ~48MB/s read and ~30MB/s write.
Massive improvement in write, but messed up in read.... I don't know what's wrong

GTMoraes said:
Just received my UHS-3 card.
Pretty disappointed by the read speeds.
I was getting ~65MB/s read and ~14MB/s write.
The SanDisk Extreme is giving me ~48MB/s read and ~30MB/s write.
Massive improvement in write, but messed up in read.... I don't know what's wrong
Click to expand...
Click to collapse
Being the inventor of trans flash memory, Sandisk seems to feel the need to provide a distinct USP, over and above the competition, for it trans flash memory products. Unfortunately this usually means they are surfing very close to edge of their fabrication technology. I base this on my observation of the ever-changing product code attached to Sandisk 128GB micro sd cards, which has changed 3 times in the last 10-12 weeks.
Put simply, like CPUs, I believe Sandisk are speed testing and grading their trans flash products, the extreme range is exactly the same as the ultra range, only labeled and marketed differently. Because there is no distinct technological advantage, there is likely to be a more pronounced range in both read and write speeds. So, while a tested write speed of, for example, 30MB/s may mean an individual micro sd card can be labeled as "extreme" by Sandisk, doesn't mean its read speed will be consistent with every other micro sd card labeled as "extreme".
Oh, and remember, only 4KB random write speed is the true write speed test for memory cards. This is the specification that makes the real difference if you need to boot an OS from the card.

gandalf_grey91 said:
Being the inventor of trans flash memory, Sandisk seems to feel the need to provide a distinct USP, over and above the competition, for it trans flash memory products. Unfortunately this usually means they are surfing very close to edge of their fabrication technology. I base this on my observation of the ever-changing product code attached to Sandisk 128GB micro sd cards, which has changed 3 times in the last 10-12 weeks.
Put simply, like CPUs, I believe Sandisk are speed testing and grading their trans flash products, the extreme range is exactly the same as the ultra range, only labeled and marketed differently. Because there is no distinct technological advantage, there is likely to be a more pronounced range in both read and write speeds. So, while a tested write speed of, for example, 30MB/s may mean an individual micro sd card can be labeled as "extreme" by Sandisk, doesn't mean its read speed will be consistent with every other micro sd card labeled as "extreme".
Oh, and remember, only 4KB random write speed is the true write speed test for memory cards. This is the specification that makes the real difference if you need to boot an OS from the card.
Click to expand...
Click to collapse
That was very informative. Yes, it seems that Sandisk is pushing any 30MB/s write card as Extreme, and if it complies with a minimum read (very minimum it seems), it's off to go.
I'm unsure whether should I return this card (need to pay shipping costs) or keep it as it is
Many thanks for this answer! I'll check for random 4kb write to see which one fares better
Tapatalked thru my CM12 G3!

GTMoraes said:
I'm unsure whether should I return this card (need to pay shipping costs) or keep it as it is
Click to expand...
Click to collapse
Two quotes from the Sandisk legal statement about Extreme 64GB micro sd card:
2) Card only. Up to 80 MB/s read; up to 50 MB/s write. Based on internal testing; performance may be lower depending upon host device.
(4) UHS Speed Class 3 designates a performance option designed to support real time video recording in U3-enabled host devices.
---------- Post added at 11:41 PM ---------- Previous post was at 11:26 PM ----------
GTMoraes said:
I'm unsure whether should I return this card (need to pay shipping costs) or keep it as it is
Click to expand...
Click to collapse
Sorry, previous numbers were for 64GB Extreme Plus micro sd cards (Costs twice as much). For 64GB Extreme micro sd card it should have read:
(2) Up to 60 MB/s read speed; up to 40 MB/s write speed. Based on internal testing; performance may be lower depending on host device, interface, usage conditions and other factors.
See what I said about grading the speed of the cards. Just so they can squeeze a little more money from their customers. BTW I see that Kingston and Lexar are doing 128GB micro sd cards now.

gandalf_grey91 said:
Two quotes from the Sandisk legal statement about Extreme 64GB micro sd card:
2) Card only. Up to 80 MB/s read; up to 50 MB/s write. Based on internal testing; performance may be lower depending upon host device.
(4) UHS Speed Class 3 designates a performance option designed to support real time video recording in U3-enabled host devices.
---------- Post added at 11:41 PM ---------- Previous post was at 11:26 PM ----------
Sorry, previous numbers were for 64GB Extreme Plus micro sd cards (Costs twice as much). For 64GB Extreme micro sd card it should have read:
(2) Up to 60 MB/s read speed; up to 40 MB/s write speed. Based on internal testing; performance may be lower depending on host device, interface, usage conditions and other factors.
See what I said about grading the speed of the cards. Just so they can squeeze a little more money from their customers. BTW I see that Kingston and Lexar are doing 128GB micro sd cards now.
Click to expand...
Click to collapse
I emailed my seller and he posted pretty much the same thing, and said my card was well within the normal operating speeds, and a replacement wouldn't make it any better.
I'm getting 51MB/s read and 33MB/s write nowadays. Guess something was running on the background back then.
Guess I'll have to live with it. It ain't too bad, and random 4k is better than the Samsung one
Tapatalked thru my CM12 G3!

The Extreme cards will get 40-50 but the Extreme Plus get around 80. The newer Pro gets 95. Its obvious Sandisk is inching forward trying to create a new product with a +$100 price point. I got lucky during the holidays and scored my 64gb Extreme Plus during the holidays for $30

xlxcrossing said:
The Extreme cards will get 40-50 but the Extreme Plus get around 80. The newer Pro gets 95. Its obvious Sandisk is inching forward trying to create a new product with a +$100 price point. I got lucky during the holidays and scored my 64gb Extreme Plus during the holidays for $30
Click to expand...
Click to collapse
Now that was a deal. I got my Extreme 64GB for what would be 90 US Dollars. That's the price around here unfortunately.
I've contacted again my seller and he seems to be okay with swapping my card. I ran the SD test three times for each of my 64GB cards to see how they would fare.
As expected, the Samsung has a higher read speed, but minimum write (Class 10, Minimum 10MB/s write speed, as I've read).
The SanDisk Extreme has a slightly lower write speed than what I thought would be 30MB/s, but nothing too bad. But read speeds are not that good, compared to a lower-end rival card.
http://imgur.com/a/KNGpT

Maximum Micro SD Card worth buying?

I believe that all micro sd speed classes work with the HTC 10:
UHS-I U1, UHS-I U3 and UHS-II U3 (the fastest available).
But the whats the maximum speed this Snapdragon 801 SOC allows? What´s the maximum speed supported, when the SOC reaches it´s top speed?
Could someone with any of these these cards please perform a speed read and write test so we can see if it´s worth buying the fastest available or not?
Cheers

HTC 10 uses a snapdragon 820, not 801.
I believe the maximum card it will take is 2TB.
Sent from my HTC 10 using Tapatalk

Double post

Sunmisola said:
HTC 10 uses a snapdragon 820, not 801.
I believe the maximum card it will take is 2TB.
Sent from my HTC 10 using Tapatalk
Click to expand...
Click to collapse
Correct, 820 SOC, sorry.
My question was regarding the speed and not storage size. I just confirmed that the snapdragon 820 it's compatible with the UHS-II cards (they have a second row of pins) but only work at UHS-I speeds.
Cheers

Oh sorry, I guess I should slow down to read. Yeah I never really knew what speed was supported, I just use a Samsung Evo UHS 2
Sent from my HTC 10 using Tapatalk

Sunmisola said:
Oh sorry, I guess I should slow down to read. Yeah I never really knew what speed was supported, I just use a Samsung Evo UHS 2
Sent from my HTC 10 using Tapatalk
Click to expand...
Click to collapse
The faster ones? Can you please do a speed test?
Cheers

If you have a look at the XDA review of the 10 you'll see it has one of the fastest sd slots on the market, I confirmed this by using a1 sd bench testing my 128gb Sandisk Extreme which gave me 86.60mb/s read and 57.47mb/s write, essentially maxing out the card, whilst internal memory gave me 226.41mb/s read and 35mb/s write (likely due to encryption). Copying from internal to micro sd copied at a consistent 55-60mb/s as well which is top for a phone.
Really impressed overall, I had a whole heap of issues with slow NAND on my one x and to a much lesser extent m8 (slow sd slot), but the 10 provides a great experience in these areas. So in short, go for the fastest card you can afford, the 10 will be able to take advantage of the extra speed, I personally went through quite a few cards and recommend the 128gb Sandisk Extreme for $60 AUD (60/90) or 128gb Toshiba u3 (30/80) for $40 AUD, otherwise the Samsung cards are pretty bullet proof but 4k video might stutter on the Evo cards and below due to slow write (20-25mb/s tops).

ryanjsoo said:
If you have a look at the XDA review of the 10 you'll see it has one of the fastest sd slots on the market, I confirmed this by using a1 sd bench testing my 128gb Sandisk Extreme which gave me 86.60mb/s read and 57.47mb/s write, essentially maxing out the card, whilst internal memory gave me 226.41mb/s read and 35mb/s write (likely due to encryption). Copying from internal to micro sd copied at a consistent 55-60mb/s as well which is top for a phone.
Really impressed overall, I had a whole heap of issues with slow NAND on my one x and to a much lesser extent m8 (slow sd slot), but the 10 provides a great experience in these areas. So in short, go for the fastest card you can afford, the 10 will be able to take advantage of the extra speed, I personally went through quite a few cards and recommend the 128gb Sandisk Extreme for $60 AUD (60/90) or 128gb Toshiba u3 (30/80) for $40 AUD, otherwise the Samsung cards are pretty bullet proof but 4k video might stutter on the Evo cards and below due to slow write (20-25mb/s tops).
Click to expand...
Click to collapse
Thanks for your answer. I just ordered the Samsung Evo PLUS UHS-I U3 64Gb since it has faster random write speeds than the PRO, even costing less. Sequential speed is slower, though. http://www.jeffgeerling.com/blogs/jeff-geerling/raspberry-pi-microsd-card which is important if you want to format it has adoptable storage.
So you have a UHS-I U3 Speed Class card, correct?
But you do know that UHS-II U3 cards do not work faster than at UHS-I speeds, right? It's important that people know the extra row of pins which enables it to work at 150mbs and more does not currently work with any smartphone on the market. I say this because they are very expensive and you can only take advantage of that speed when using it with an adapter connected to a PC. So buying it is kind of wasting money since they are much more expensive.
Cheers

investing here...

Badelhas said:
Thanks for your answer. I just ordered the Samsung EVO UHS-I U3 64Gb since it has faster random write speeds than the PRO. http://www.jeffgeerling.com/blogs/jeff-geerling/raspberry-pi-microsd-card which is important if you want to format it has adoptable storage.
So you have a UHS-I U3 Speed Class card, correct?
But you do know that UHS-II U3 cards do not work faster than at UHS-I speeds, right? It's important that people know the extra row of pins which enables it to work at 150mbs and more does not currently work with any smartphone on the market. I say this because they are very expensive and you can only take advantage of that speed when using it with an adapter connected to a PC. So buying it is kind of wasting money since they are much more expensive.
Cheers
Click to expand...
Click to collapse
So you ended up getting the 10 Badelhas? Hope you're enjoying the phone if you did.
Yep, I'm using a U3 (30mb/s min write), UHS-I card, it does NOT have the extra pins that enable faster performance that UHS-II cards have. You're right, UHS-II cards are far too expensive anyway and the 10 doesn't support them. Honestly wouldn't recommend using adoptable storage, it'll really slow the phone down since the performance becomes bound by the slower memory (the card), even with my Extreme card, performance was noticeably worse, at least in my experience. Pretty much the only benefit of using adoptable storage is for installing games/apps, but if you need it, I can't stop you (as much as I would like to).

ryanjsoo said:
So you ended up getting the 10 Badelhas? Hope you're enjoying the phone if you did.
Yep, I'm using a U3 (30mb/s min write), UHS-I card, it does NOT have the extra pins that enable faster performance that UHS-II cards have. You're right, UHS-II cards are far too expensive anyway and the 10 doesn't support them. Honestly wouldn't recommend using adoptable storage, it'll really slow the phone down since the performance becomes bound by the slower memory (the card), even with my Extreme card, performance was noticeably worse, at least in my experience. Pretty much the only benefit of using adoptable storage is for installing games/apps, but if you need it, I can't stop you (as much as I would like to).
Click to expand...
Click to collapse
No, I still haven't bought the 10, still debating. I have an old class 10 32gb micro sd card on my HTC one m8 and since I ordered a new Samsung 850 EVO 250gb SSD for my pc I thought "what the heck, I'm ordering a new, bigger and faster micro sd card". Impulse buying, I know ? But it only cost 18 euros.
I hope that my HTC One M8 is able to take advantage of the faster speed of the card but that user's post made me think I probably won't

I've just realized that the samsung evo+ I ordered is a UHS-I U1 card and not a U3 speed class so I just canceled my order.

Which is the best microSD card for XZ?

Hello everyone, I've just moved from Z1 to XZ Mine was a 64GB internal storage version but I still would like to expand it through microSD card. So I hope you guy can recommend me a good one to choose so as to get the best possible speed XZ can handle. Thanks everyone in advance.
So as of right now I am considering some of these options as in my country they have similar prices which I can afford:
32GB:
- MicroSDHC SanDisk Extreme V30 600x 32GB
Read: 90MB/s
Write: 60MB/s
- MicroSDHC Kingston 32GB U3
Read: 90MB/s
Write: 80MB/s
64GB:
- MicroSDXC Samsung EVO Plus 64GB
Read: 80MB/s
Write: 20MB/s
- MicroSDXC SanDisk Ultra 64GB
Read: 80MB/s
Write: 15MB/s
Should I go with any of these options or should I just go with cheaper ones? Would it affect the camera's speed or the phone's speed in general?

Would say the Kingston ones, u have a 64 gb xz, so unless you use much and much storage the high speed 32gigs will be enough ?

I have MicroSDXC Samsung EVO Plus 128GB class 10 and it works fine. Not sure how to tell if it is fast or no but transferring data from phone to pc or from pc to phone goes as fast as internal storage maybe 1-2 seconds slower but still perform pretty good. So I assume 64gb will be fine too. I dont know about kingston or sandisk but I know they are good too.
PS: I didn't notice any differences in camera performance. Look good to me.

Sandisk ultra 200 gb

My opinion is anything but kingston lol
and maybe getting 128Gb is a better idea coz when u run out of memory, replacing means u wasted money on your old cards

Thank guys. After much consideration through your advises, I've settled with MicroSDXC Samsung EVO Plus 64GB (it also got sale in my country ). So far everything seem fine. Camera saving picture speed seem about the same with internal storage.

I got a 128 GB class 10 San disk extreme SDXC and it's working real well for me symlinked adopted storage

Got samsung 256 evo+n 90+ read write. BUT those speed can be achieved only with decent cardreader or there is a Sony USB 3.1 Gen2 cable that can provide 10gb/s but cant say if it works when u plug it to phone, also u must have such Highspeed usb3.1 gen 2 port on motherboard or laptop.

MicroSD Speed for this phone?

It has been a while since I've needed to get a MicroSD card for a phone. As you all know, the 512 GB option is out of stock and the only thing I was able to get my hands on was a 128 GB version of the S20 Ultra. Company paid for it.
What MicroSD speed is recommended for this phone? Am I looking at getting at least V60 to be able to use this phone appropriately? What would give me an "internal storage" experience? I didn't always have great experiences with removable storage on phones with lag, but this was years ago when speeds weren't even close to what we have today.
Advice is appreciated. Thank you!

reviad said:
It has been a while since I've needed to get a MicroSD card for a phone. As you all know, the 512 GB option is out of stock and the only thing I was able to get my hands on was a 128 GB version of the S20 Ultra. Company paid for it.
What MicroSD speed is recommended for this phone? Am I looking at getting at least V60 to be able to use this phone appropriately? What would give me an "internal storage" experience? I didn't always have great experiences with removable storage on phones with lag, but this was years ago when speeds weren't even close to what we have today.
Advice is appreciated. Thank you!
Click to expand...
Click to collapse
How much storage space do you need? Size matters! Write Speed matters when you're shooting 4K Hi-Def Videos or Burst Photos. The Lexar Professional 1800x U3 microSD is very fast at a reasonable price as well. It's 128GB has all the speed you'll ever need and the smaller 64GB is even faster!

varcor said:
How much storage space do you need? Size matters! Write Speed matters when you're shooting 4K Hi-Def Videos or Burst Photos. The Lexar Professional 1800x U3 microSD is very fast at a reasonable price as well. It's 128GB has all the speed you'll ever need and the smaller 64GB is even faster!
Click to expand...
Click to collapse
I think an additional 128 GB would do the trick.
Looks like the 1800x is a v90 card, correct? Are v90 speeds comparable to internal storage speeds?

reviad said:
I think an additional 128 GB would do the trick.
Looks like the 1800x is a v90 card, correct? Are v90 speeds comparable to internal storage speeds?
Click to expand...
Click to collapse
Yes it's v90 rated. I've yet to experience an SD or MicroSD which processes as quickly as Internal Storage. How much of a lag is dependent on File Type, MicroSD Capacity and Card Speed. I fly often and enjoy watching movies on my device and paying considerably more for High Capacity Internal Storage isn't compelling.
I also put every file possible on the MicroSD. I don't have faith in Cloud Storage Security and if for any reason my device malfunctions I won't sacrifice any data, plus whenever I upgrade a device I can forego time consuming file transfers. Movies are petty large files so I use a 512GB MicroSD which isn't as fast as a lower capacity card. When I open the file I experience a couple of seconds of lag. For me it's a non issue when I take into consideration all of the advantages.

reviad said:
I think an additional 128 GB would do the trick.
Looks like the 1800x is a v90 card, correct? Are v90 speeds comparable to internal storage speeds?
Click to expand...
Click to collapse
No where near close. the 1800X is ok but I returned it as the speeds didn't match enough of the lower model(s) at the price point. Better to buy the higher internal storage model, but obviously may be too late.

I benchmarked the internal memory in my S20U 512GB against my 512GB Samsung EVO Plus microSD card. The results show that a microSD will not come close to the performance of the phone's internal memory.
Internal memory
Read: 1000.13 MB/s
Write: 384.36 MB/s
Samsung EVO Plus 512BGB MicroSD
Read: 72.27 MB/s
Write: 45.47 MB/s

varcor said:
How much storage space do you need? Size matters! Write Speed matters when you're shooting 4K Hi-Def Videos or Burst Photos. The Lexar Professional 1800x U3 microSD is very fast at a reasonable price as well. It's 128GB has all the speed you'll ever need and the smaller 64GB is even faster!
Click to expand...
Click to collapse
Sleepycat3 said:
I benchmarked the internal memory in my S20U 512GB against my 512GB Samsung EVO Plus microSD card. The results show that a microSD will not come close to the performance of the phone's internal memory.
Internal memory
Read: 1000.13 MB/s
Write: 384.36 MB/s
Samsung EVO Plus 512BGB MicroSD
Read: 72.27 MB/s
Write: 45.47 MB/s
Click to expand...
Click to collapse
Thanks. That's a UHS-I card, so it will be slower than the Lexar 1800x, which is UHS-II However, it really gives me an idea of differences that I can expect. Thank you for posting that.
I think I'm going to go with the Lexar 1800x and hope for the best.

shollywood said:
No where near close. the 1800X is ok but I returned it as the speeds didn't match enough of the lower model(s) at the price point. Better to buy the higher internal storage model, but obviously may be too late.
Click to expand...
Click to collapse
What did you get instead of the 1800x?
Sent from my SM-G965U1 using Tapatalk

reviad said:
Thanks. That's a UHS-I card, so it will be slower than the Lexar 1800x, which is UHS-II However, it really gives me an idea of differences that I can expect. Thank you for posting that.
I think I'm going to go with the Lexar 1800x and hope for the best.
Click to expand...
Click to collapse
You will need to check that the S20 supports UHS-II. I have not been able to find any confirmation that it does (it would be a great marketing advantage if it did, so I don't think it would have been a hidden feature), so I don't think it does. When you use a UHS-II card in a UHS-I device, the speed will default back to UHS-I because it is missing the extra pins required for UHS-II.

Sleepycat3 said:
You will need to check that the S20 supports UHS-II. I have not been able to find any confirmation that it does (it would be a great marketing advantage if it did, so I don't think it would have been a hidden feature), so I don't think it does. When you use a UHS-II card in a UHS-I device, the speed will default back to UHS-I because it is missing the extra pins required for UHS-II.
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You were right. I was incorrectly assuming that a phone at this price point would support UHS-II, but it does not. Well, that will save me a few bucks while forcibly sacrificing speed

reviad said:
I think an additional 128 GB would do the trick.
Looks like the 1800x is a v90 card, correct? Are v90 speeds comparable to internal storage speeds?
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reviad said:
What did you get instead of the 1800x?
Sent from my SM-G965U1 using Tapatalk
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Lexar 633X, almost the same speeds, nothing noticeable in difference, benchmarking was like .3 difference

Sleepycat3 said:
You will need to check that the S20 supports UHS-II. I have not been able to find any confirmation that it does (it would be a great marketing advantage if it did, so I don't think it would have been a hidden feature), so I don't think it does. When you use a UHS-II card in a UHS-I device, the speed will default back to UHS-I because it is missing the extra pins required for UHS-II.
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UHS-II does allow faster file transfer on the S20 than UHS-I which I appreciate since I'm constantly uploading new movies. 270 MB Read, 250 MB Write with the Lexar 1800x which is around three times the speed of most UHS-I Cards. Will it give you Internal Storage speeds? External Memory Cards will likely never approach that lofty goal.

varcor said:
UHS-II does allow faster file transfer on the S20 than UHS-I which I appreciate since I'm constantly uploading new movies. 270 MB Read, 250 MB Write with the Lexar 1800x which is around three times the speed of most UHS-I Cards. Will it give you Internal Storage speeds? External Memory Cards will likely never approach that lofty goal.
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Would love to see a the speedtest of the Lexar 1800x UHS-II in the S20. If the main purpose is to upload movies into the card while on the PC through a UHS-II reader, then yes, there are speed benefits there. But it depends on the usage and how time critical that task is. When uploading from PC to the microSD card using a reader on your desktop, there is the opportunity to begin the upload into the MicroSD card, go away to grab a snack or dinner or breakfast. By the time you come back, it is all done. A different usage situation would be to copy directly into the MicroSD card while it is in your phone, so that would definitely benefit from higher speeds as you won't be able to use or bring your phone with you while it is copying.
The other interesting card for the S20 would be A2 rated cards. These have 4 times higher random write and almost 3 times higher random read IOs compared to A1 which in turn is better than not A rated cards. These would benefit if you were running apps off your microSD card. My Samsung Evo Plus 512GB performs almost at A1 levels, but way lower than A2.

reviad said:
It has been a while since I've needed to get a MicroSD card for a phone. As you all know, the 512 GB option is out of stock and the only thing I was able to get my hands on was a 128 GB version of the S20 Ultra. Company paid for it.
What MicroSD speed is recommended for this phone? Am I looking at getting at least V60 to be able to use this phone appropriately? What would give me an "internal storage" experience? I didn't always have great experiences with removable storage on phones with lag, but this was years ago when speeds weren't even close to what we have today.
Advice is appreciated. Thank you!
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If you wanna your micro sd speed to be as similar to the internal memory u need to use UFS Memory
https://www.samsung.com/us/computing/memory-storage/memory-cards/ufs-memory-card-128gb-mb-fa128g-am/

UFS is not supported on S20 .... so sad but it's true...

Sleepycat3 said:
Would love to see a the speedtest of the Lexar 1800x UHS-II in the S20. If the main purpose is to upload movies into the card while on the PC through a UHS-II reader, then yes, there are speed benefits there. But it depends on the usage and how time critical that task is. When uploading from PC to the microSD card using a reader on your desktop, there is the opportunity to begin the upload into the MicroSD card, go away to grab a snack or dinner or breakfast. By the time you come back, it is all done. A different usage situation would be to copy directly into the MicroSD card while it is in your phone, so that would definitely benefit from higher speeds as you won't be able to use or bring your phone with you while it is copying.
The other interesting card for the S20 would be A2 rated cards. These have 4 times higher random write and almost 3 times higher random read IOs compared to A1 which in turn is better than not A rated cards. These would benefit if you were running apps off your microSD card. My Samsung Evo Plus 512GB performs almost at A1 levels, but way lower than A2.
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I did a speed test on the 1800 already, nowhere close to what Varcor is claiming. Perhaps he/she can post proof of those speeds? Here is mine: