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Maximum SD Card speed?

does anyone know the max sd card transfer speed of the pad, and the dock?
i am looking at a 128GB SDXC card (yes, its a lot, but this is replacing a dead laptop for the foreseeable future) , UHS-1 60mb/s, or a 45mb/s one. will the UHS card actually have any benefits in the dock, or simply when transfering data to it from the PC.
many thanks!

I'm currently running a Class 10 (200x) 32 GB SDHC in the dock, branded Dane-Elec. Runs fine. I don't know if it takes 32+ GB cards, though... And to be honest, while heavily dependent on what you actually do with it, for most purposes a high-speed card should suffice...

ishamm said:
does anyone know the max sd card transfer speed of the pad, and the dock?
i am looking at a 128GB SDXC card (yes, its a lot, but this is replacing a dead laptop for the foreseeable future) , UHS-1 60mb/s, or a 45mb/s one. will the UHS card actually have any benefits in the dock, or simply when transfering data to it from the PC.
many thanks!
Click to expand...
Click to collapse
I'm currently using two Sandisk cards:
- microSD class 10 30MBps SDHC Ultra (16GB)
- full SD class 10 SDHC Extreme 45MBps in the docking station (32GB)
They get better speeds than the built-in disk, but it is still not great. It seems to be about 15-18Mbps write for SD, 6Mbps write for microSD and 30-32Mbps read for both (as compared to 12/18 of the internal memory).
The fastest way of moving data still seems to be external USB HDD...
Hope this helps, haven't tried any other yet. I have tried both FAT32 and NTFS though. They seem to give similar results (I had no problems using NTFS on my SD card so far, which is a good sign).

d14b0ll0s said:
I'm currently using two Sandisk cards:
- microSD class 10 30MBps SDHC Ultra (16GB)
- full SD class 10 SDHC Extreme 45MBps in the docking station (32GB)
They get better speeds than the built-in disk, but it is still not great. It seems to be about 15-18Mbps write for SD, 6Mbps write for microSD and 30-32Mbps read for both (as compared to 12/18 of the internal memory).
The fastest way of moving data still seems to be external USB HDD...
Hope this helps, haven't tried any other yet. I have tried both FAT32 and NTFS though. They seem to give similar results (I had no problems using NTFS on my SD card so far, which is a good sign).
Click to expand...
Click to collapse
I haven't used an external drive yet, but I agree with the observation that the transfer speed is not optimal, no matter what card I plug in (I have transplanted a few I normally use in my DSLR just for testing; they are all fast cards, as you can imagine). I transferred several documentaries and a lot of photographs yesterday evening and it took ages, mainly due to the fact that the transfer process hangs up the entire device (!) regularly. It seems to happen after about 70 to 80 MB are read into (temporary?) memory and apparently are only then buffered out to the main storage. Let's hope a custom ROM can straighten this issue out...

Thanks. Given these figures, would you install apps on the main memory, if a 30mbps rated micro sd for best performance?
Sent from my LT26i using xda premium

ishamm said:
Thanks. Given these figures, would you install apps on the main memory, if a 30mbps rated micro sd for best performance?
Sent from my LT26i using xda premium
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Click to collapse
In my case internal memory is faster than microSD. You don't really have the option, unless you play with the filesystem and mount your MicroSD on /mnt/sdcard instead of /Removable/MicroSD. In the Infinity /mnt/sdcard is just a folder within the internal memory by default (many apps use it though, so they had to arrange it this way). I don't think there is any reason to change this, as internal memory seems faster and that's whole 64GB of it (OK, maybe 56 available, but still a lot..).

Perfect thanks, I thought though that there were current issues with I/O speeds until someone could fix it in a Rom. Or has this been addressed in the new firmware?
Sent from my LT26i using xda premium

ishamm said:
Perfect thanks, I thought though that there were current issues with I/O speeds until someone could fix it in a Rom. Or has this been addressed in the new firmware?
Click to expand...
Click to collapse
Hopefully I could tell you in a few days, but honestly I don't think it has (can't try it out yet, as the firmware released is Taiwanese version, and I'm on the World-Wide).
The Infinity is not that far behind other new tablets or rather it's not only TF700's problem, see http://forum.xda-developers.com/showpost.php?p=28416635&postcount=2842
However, after changing the scheduler to sio and doing some tweaks (see my post on it: http://forum.xda-developers.com/showthread.php?t=1758160), it's running pretty smoothly (unless you want to do a lot of CPU-heavy jobs while having huge reads or writes in the background, in this case it can get frustrating, but.. there is no real alternative these days).

d14b0ll0s said:
Hopefully I could tell you in a few days, but honestly I don't think it has (can't try it out yet, as the firmware released is Taiwanese version, and I'm on the World-Wide).
The Infinity is not that far behind other new tablets or rather it's not only TF700's problem, see http://forum.xda-developers.com/showpost.php?p=28416635&postcount=2842
However, after changing the scheduler to sio and doing some tweaks (see my post on it: http://forum.xda-developers.com/showthread.php?t=1758160), it's running pretty smoothly (unless you want to do a lot of CPU-heavy jobs while having huge reads or writes in the background, in this case it can get frustrating, but.. there is no real alternative these days).
Click to expand...
Click to collapse
This. As i've ranted earlier, the new firmware provides fixes for camera issues, not for the I/O the TF700 so obviously suffers from. Having said that, it is not like the tablet in itself is useless as it is -- far from it -- but remains a mystery to me why they didn't spot this in advance (like with the Prime's issues with GPS and wifi), It seems like ASUS develops a device by letting several teams work onindividual components, and, when they get their specific part up and running, just put it together and relese it. I have a distinct feeling that neither device was actually and properly tested.
But, still, I'm pretty happy with the device overall.

I think you need to read this thread:
http://forum.xda-developers.com/showthread.php?t=1767755
From what I see my UHS-1 card that doesn't work is initialized as DDR which means the max speed for the TF700T µSD is 50 MB/s (as that is the only DDR speed).
The full size SD socket uses a USB host so the big question is is it USB 2.0 or 3.0!

All specifications says USB 2.0 for the dock, so I would assume that's correct, even for the TF700 dock.

Asus has finally responded that there is limited UHS-1 support in the µSD slot.
For now you are better off not trying UHS-1 in there. The may come up with a patch...

external memory limits
ishamm said:
does anyone know the max sd card transfer speed of the pad, and the dock?
i am looking at a 128GB SDXC card (yes, its a lot, but this is replacing a dead laptop for the foreseeable future) , UHS-1 60mb/s, or a 45mb/s one. will the UHS card actually have any benefits in the dock, or simply when transfering data to it from the PC.
many thanks!
Click to expand...
Click to collapse
Careful there with a 128gig card, I read somewhere that there is a 32 gig upperlimit on recognizing cards and sticks...
tho I do wonder if you formatted it into enough partitions it might read them all?

kokoPedli said:
Careful there with a 128gig card, I read somewhere that there is a 32 gig upperlimit on recognizing cards and sticks...
tho I do wonder if you formatted it into enough partitions it might read them all?
Click to expand...
Click to collapse
If the dock uses a sdhc compatible controller and simply exposes the card as a mass storage device for the system, then there is really no such limit. The SDXC cards which supports >32GB does so due to the SD's FAT specification not for actual addressing and such.
SDXC cards are accessible as SDHC but standard specifies ExFat as default filesystem. This may not work on units not compatible with ExFat, but a reformat will fix that. In the TF700T's case we have already seen users use 64 GB cards breaking that 32GB barrier.
We have also seen the TF700T mount ExFat, although it seems to fallback to NTFS.
The thing he should be carefull of is UHS in the µSD socket as it's still wonky.
In the dock I suspect a UHS card will simply be treated as a normal SDHC card, but UHS cards usually have better class speeds so may be a benefit even with the dock doing USB2.0 hosting.
Edit:
To back up my claims see here...
http://kb.sandisk.com/app/answers/detail/a_id/2520/~/sd/sdhc/sdxc-specifications-and-compatibility

File transfer extremely slow Z3

Hi, I recently bought an xperia z3 and also a class 10 micro sd card 32gb.
When I tried to copy some files it takes forever to copy them, also I can notice that file transfer rate goes between 0kb to 3.5mb approx.
I've tried to change transfer mode on USB options from MTP to XXX and there is no change.
My sd card is an: sanDisk 32gb micro sd hc class 10
I have windows 8.1. Also I installed (several times) just in case Sony PC Companion and the drivers that comes with the phone bus nothing.
Some times I got a window saying that the devise is busy and I can not copy some files.
Last thing, I bought it unlocked but when I turn it on it says T-Mobile.
I do not know what else to do, please help ME!

seba240184 said:
Hi, I recently bought an xperia z3 and also a class 10 micro sd card 32gb.
When I tried to copy some files it takes forever to copy them, also I can notice that file transfer rate goes between 0kb to 3.5mb approx.
I've tried to change transfer mode on USB options from MTP to XXX and there is no change.
My sd card is an: sanDisk 32gb micro sd hc class 10
I have windows 8.1. Also I installed (several times) just in case Sony PC Companion and the drivers that comes with the phone bus nothing.
Some times I got a window saying that the devise is busy and I can not copy some files.
Last thing, I bought it unlocked but when I turn it on it says T-Mobile.
I do not know what else to do, please help ME!
Click to expand...
Click to collapse
Did u format the card inside phone...? Try using other card.
I have sandisk ultra 32gb class 10 and it works fine.
Also about ur device its an unlocked device with t- mobile firmware...if u want u can always flash a generic firmare for your region...
And what do u mean by XXX it should be MSC right??mass storage connection..
And u don't need any specific drivers just the common usb drivers...may be ur card is faulty.. Check with other phone as u check other card with ur phone

Same here with Transcend MicroSDHC 32GB Class 10. My card was faulty. Formated it a few times through Windows, without success. Then tried another Class 4 card, no problems at all.

Sorry, XXX was a recordatory to replace with the other USB connection type...
I've already format the sd card over the phone but same result. Maybe fknpwned is right, maybe it's that card (class and brand).
The only thing left to test it is to try another similar sd card. :crying:
unmaskedfalesh said:
Did u format the card inside phone...? Try using other card.
I have sandisk ultra 32gb class 10 and it works fine.
Also about ur device its an unlocked device with t- mobile firmware...if u want u can always flash a generic firmare for your region...
And what do u mean by XXX it should be MSC right??mass storage connection..
And u don't need any specific drivers just the common usb drivers...may be ur card is faulty.. Check with other phone as u check other card with ur phone
Click to expand...
Click to collapse

seba240184 said:
Sorry, XXX was a recordatory to replace with the other USB connection type...
I've already format the sd card over the phone but same result. Maybe fknpwned is right, maybe it's that card (class and brand).
The only thing left to test it is to try another similar sd card. :crying:
Click to expand...
Click to collapse
Your firmware also might be the culprit..since its T-Mobile unlocked firmware anyways i would go more towards card fault..try the other card..

Same problem with my Strontium 466x Nitro 32GB SD card. The problem is not with the card. I tried it using Galaxy S5 and it gives me a transfer rate of about 25-35MBps. But when I use Z3, format it in the phone itself and try to copy stuff, it barely crosses the 6MBps mark. I'm on 23.0.1.A.5.77 firmware. Dumb Z3. How many more issues must I deal with?? Duh!!!

santoshcoolhere said:
Same problem with my Strontium 466x Nitro 32GB SD card. The problem is not with the card. I tried it using Galaxy S5 and it gives me a transfer rate of about 25-35MBps. But when I use Z3, format it in the phone itself and try to copy stuff, it barely crosses the 6MBps mark. I'm on 23.0.1.A.5.77 firmware. Dumb Z3. How many more issues must I deal with?? Duh!!!
Click to expand...
Click to collapse
Z3 doesn't fully support strontium there is already discussion on the 64gb strontium... Most us using sandisk ultra here it works flawlessly...
Also dont forget s5 is an usb 3.0 device so don't compare usb copy speed as it will be faster compared to any usb 2.0 except apple's lighting port..and speed in your case is normal 5-6mbps is okay..fr usb 2.0..

I never use phone software to transfer files from my phone to pc or vice versa. Just open 2 "my computer" pages side by side & drag & drop the desired file. This works just as well for me on the z3 as it did on my symbian phone before. Very similar speed, i am using the same card in both, sandisc class 10

unmaskedfalesh said:
Z3 doesn't fully support strontium there is already discussion on the 64gb strontium... Most us using sandisk ultra here it works flawlessly...
Also dont forget s5 is an usb 3.0 device so don't compare usb copy speed as it will be faster compared to any usb 2.0 except apple's lighting port..and speed in your case is normal 5-6mbps is okay..fr usb 2.0..
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Click to collapse
OK So basically S5 is way better than Z3 in data transfer?? That does suck TBH because Z3 was launched months after the S5
So what should I do if I want to get better transfer rates, say somewhere around the 30s ???
Kindly suggest a 64GB card. Mine is already full.

santoshcoolhere said:
OK So basically S5 is way better than Z3 in data transfer?? That does suck TBH because Z3 was launched months after the S5
So what should I do if I want to get better transfer rates, say somewhere around the 30s ???
Kindly suggest a 64GB card. Mine is already full.
Click to expand...
Click to collapse
Its not when they are released... Its what they use...sammy used usb 3.0 dat flat slot that looks way ugly..imo..
And try sandisk ultra 64 gb class 10 or sandisk ultra 128gb if u wany way more memory

Class 10 means write 10mb/s. And this condition accures only with big files, if you are copying small files write speed can drop to kb/s.
Just because of that i upgraded my 32gb class 10 sd card with 64gb samsung pro read 90, write 80. That was huge improvment. Dont expect too much from regular class 10 sdcards.
Sent from my C6603 using Tapatalk

eryen said:
Class 10 means write 10mb/s. And this condition accures only with big files, if you are copying small files write speed can drop to kb/s.
Just because of that i upgraded my 32gb class 10 sd card with 64gb samsung pro read 90, write 80. That was huge improvment. Dont expect too much from regular class 10 sdcards.
Sent from my C6603 using Tapatalk
Click to expand...
Click to collapse
Not entirely true, it means a guaranteed minimum of 10MB/s transfer rate. So in reality any card faster than 10MB/s read and write.
I used to have the Sandisk Ultra, and was completely unimpressed by the performance ( you get what you pay for)
I have the Sandisk Pro Extreme, and in the phone I get around 40-50MB/s read and write, about twice as fast writing speed as most other microsd cards in phone. Note this is also the exact same speed as the internal memory so the limitation is clearly the interface (pipeline) the phone uses to access the memory.
As mentioned here earlier you will not get much faster than this due to the limitation of bandwidth with the USB 2 interface, if I am serious and want to transfer lots of larger files, I will remove the card and use a UDMA card reader which will give me around 90MB/s write speed

No matter what usb I use the transfer rate remains same!
I thought buying a new usb drive which supports 3.0 function would increase the speed more than 2.0 usb drives. But that didn't happened, no matter what kind of usb drive I use the problem remains the same. When I had this issue I used GS Richcopy 360 to solve it and the transfer speed was quite good. It has multi threaded file transfer ability meaning it can transfer multiple files at a time. Try it, it solved my problem, hope it solves yours too!

SD card question.

hi all,
i got my A9 2 days ago and have a fault with it rebooting randomly and will be getting it replaced,,
but my question is about the SD card aspect..
i fitted a Lexar 64GB Class 10 High Speed Micro SDXC Memory Card and after formating as internal and migrating the data i had a system message saying that the card was slow and suggested using a card class 3 or better.
is this normal? have not noticed any performance issues since doing so.. just curious to see if anyone else has had similar messages after putting in the SD card.

I might be off base here, but is it possible that the card itself is a fake? Have you run a speed test on it?

jellmoo said:
I might be off base here, but is it possible that the card itself is a fake? Have you run a speed test on it?
Click to expand...
Click to collapse
have run a couple of tests but not sure what speeds i should be getting for this card..
cant post a screen shot yet as im a new user..
the results from an extended accurate test
are
1.52 GHz
read 38.6Mb/s
write 38.6Mb/s
when running one of the tests it did say that its cached the data as either there was too much free space or the SD card is slow.

Honestly, that's a little weird. The results seem a little low for a high end new card which should have speeds of 80Mb/s and up, but also too high for a fake which is usually lower than 10Mb/s.
Since you're getting the device replaced anyway, it might be a good idea to re-check once you have the new unit just to make sure it isn't some bizarre issue with that specific handset.
To compare, I've currently paired my A9 with a 32GB Samsung Pro card, and haven't seen such a warning message.

Download A1 SD Bench from the PlayStore.

Tikerz said:
Download A1 SD Bench from the PlayStore.
Click to expand...
Click to collapse
the results are from that app.

jellmoo said:
Honestly, that's a little weird. The results seem a little low for a high end new card which should have speeds of 80Mb/s and up, but also too high for a fake which is usually lower than 10Mb/s.
Since you're getting the device replaced anyway, it might be a good idea to re-check once you have the new unit just to make sure it isn't some bizarre issue with that specific handset.
To compare, I've currently paired my A9 with a 32GB Samsung Pro card, and haven't seen such a warning message.
Click to expand...
Click to collapse
what speeds are you getting?

I have a SanDisk 128GB class 10 and I get 43.70MB/s read and 12.45MB/s write using A1 SD Bench.

Samsung 128GB Pro Plus SD card slow?

I just bought a Samsung Pro Plus 128GB SD Card but it's very slow.
A1 test result was R:59MB/s W:28MB/s
I am fully aware S7's SD interface not good enough for the card's full speed(R95/W90)
But from what I read elsewhere, at least it has R70/W60 in A1 TEST.
My result is way below. Any idea why? Maybe I need to format the card to specific format like exFat? Thanks!

The speeds sounds about right. It's the S7's SD card interface that's the problem. It seems to max out about 28 Mbps write and depending on the card anywhere between 60-70 Mbps read. So yours seems to be good.

gunemalli said:
The speeds sounds about right. It's the S7's SD card interface that's the problem. It seems to max out about 28 Mbps write and depending on the card anywhere between 60-70 Mbps read. So yours seems to be good.
Click to expand...
Click to collapse
Thanks for your reply Gunemalli but I am sure I've seen somewhere people posting A1 benchmark with over 60MB/s write speed.
Sent from my SM-G930F using Tapatalk

After Ten Tests these are my Maximum results.
My SD Card: Lexar 1000x U3

Update:
I dont get More than 37 MB Write Speed

darkinners said:
I just bought a Samsung Pro Plus 128GB SD Card but it's very slow.
A1 test result was R:59MB/s W:28MB/s
I am fully aware S7's SD interface not good enough for the card's full speed(R95/W90)
But from what I read elsewhere, at least it has R70/W60 in A1 TEST.
My result is way below. Any idea why? Maybe I need to format the card to specific format like exFat? Thanks!
Click to expand...
Click to collapse
Mine is also slow. I too noticed it from day 1. Samsung is not dump to giveaway high class 128GB cards to everyone. Most of them should have got those which didn't even pass quality testing.

hardware and/or software limitation. that card can obviously do faster.
chances are it wont be addressed, ever, sadly, which is a shame, so is sammy not offically working with adoptive storage out-of-box, but that has its own issues and limitations.

SD Card Recommendations

Anyone use Samsung micro SD cards in their U12 (or other device)?
I've used SanDisk exclusively the last few years, and PNY before that. But, the Samsung Evo cards are consistently $10-$15 cheaper for a UHS-3 128gb card.
Just wondering if anyone else uses them, and how well they work for 4K videos.

the Samsung ones are the best, but the PNY 256GB is UHS III class 10 speed V30 A1, and works very well on my HTC U12+, for the price worth each penny

Ricardo_G said:
the Samsung ones are the best, but the PNY 256GB is UHS III class 10 speed V30 A1, and works very well on my HTC U12+, for the price worth each penny
Click to expand...
Click to collapse
I got uhs samsung microsd 64gb. I got it from my previous phone note4. No problem. Very quick read and write.

I am using Sandisk's Extreme Pro 64GB UHS-II - https://www.sandisk.com/home/memory-cards/microsd-cards/extremepro-microsd-uhs-ii for my 4K recording and playback... very fast read and write speeds with no problems to report.

AtAM1 said:
I am using Sandisk's Extreme Pro 64GB UHS-II - https://www.sandisk.com/home/memory-cards/microsd-cards/extremepro-microsd-uhs-ii for my 4K recording and playback... very fast read and write speeds with no problems to report.
Click to expand...
Click to collapse
Do you save your pictures to the SDCARD or internal storage?
I'm getting the message my SDCARD isn't fast enough when I save to it from the photo app using this Kingston SDCA3/64GBSP 64 GB microSDHCUHS-I Speed Class3 U3 Memory Card so looks like I need to upgade my card. Just that Extreme pro is over £100 so want to make sure it works without any warnings before I pull the trigger on it.
Thanks

Jump1ng said:
Do you save your pictures to the SDCARD or internal storage?
I'm getting the message my SDCARD isn't fast enough when I save to it from the photo app using this Kingston SDCA3/64GBSP 64 GB microSDHCUHS-I Speed Class3 U3 Memory Card so looks like I need to upgade my card. Just that Extreme pro is over £100 so want to make sure it works without any warnings before I pull the trigger on it.
Thanks
Click to expand...
Click to collapse
Yup, I save both 4K videos and pictures to the SD-Card with zero problems. Just make sure you don't encrypt the SD-Card as it impacts both read/write speeds which in turn results in the slow speed warning being displayed.
Cheers
Edit: I got mine at a discounted price of $95

AtAM1 said:
Yup, I save both 4K videos and pictures to the SD-Card with zero problems. Just make sure you don't encrypt the SD-Card as it impacts both read/write speeds which in turn results in the slow speed warning being displayed.
Cheers
Click to expand...
Click to collapse
Cool, think gonna have to buy this card as my old card that worked fine in the HTC 10 and u11 is not encrypted and still get the warnings.
Thanks!

Jump1ng said:
Do you save your pictures to the SDCARD or internal storage?
I'm getting the message my SDCARD isn't fast enough when I save to it from the photo app using this Kingston SDCA3/64GBSP 64 GB microSDHCUHS-I Speed Class3 U3 Memory Card so looks like I need to upgade my card. Just that Extreme pro is over £100 so want to make sure it works without any warnings before I pull the trigger on it.
Thanks
Click to expand...
Click to collapse
I was getting the same message for my transcend card, I almost bought a new sandisk card, and stumbled onto the storage settings for the card on the phone. It gives me the option to format the card for the phone. It says that after formatting, the card will only work with the the phone. I am ok with that because it is for the phone and I like to store my pics on the external sd card to not waste space on the internal. Just go to settings > storage > portable storage (select the setting icon next to your sd card) > format