Database Develop

[Q] MicroSD Selection Help - Nook Color

What MicroSDHC cards have any of you used successfully with the Nook Color? I intend to run Froyo off it until the Honeycomb ports become more stable.
I was considering the Patriot LX Class10 16GB from Newegg, but there is one review saying they had issues. Is this just a case of user error? Has anyone used this card successfully? Any suggestions on other quick cards with good capacity and decent pricing?
I assume this subject has already been covered, but my web searches only got me about 30 tabs open in Chrome and a lot of threads with vague answers that go off topic. If one isn't out there yet, a sticky thread for people to list specific cards they are using would be awesome.
I would appreciate any help.

I've used a Patriot Class 10 8 gig and a Kingston Class 4 4 gig successfully.
The Patriot tests out as a Class 10, significantly faster than the Kingston, yet both gave me UI response significantly choppier and frustrating compared to stock eclair (rooted). Both were similar.
And no, it wasn't the media server.
I put it down as standard using booting from an SD even though other people have commented on SD froyo being snappier. Maybe both cards suck for froyo.

SD card speeds
Here are my numbers:
Patriot 8 gig Class 10
-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 (C) 2007-2010 hiyohiyo
Crystal Dew World : Crystal Dew World
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]
Sequential Read : 20.049 MB/s
Sequential Write : 13.894 MB/s
Random Read 512KB : 19.281 MB/s
Random Write 512KB : 1.687 MB/s
Random Read 4KB (QD=1) : 2.418 MB/s [ 590.2 IOPS]
Random Write 4KB (QD=1) : 0.014 MB/s [ 3.5 IOPS]
Random Read 4KB (QD=32) : 3.324 MB/s [ 811.6 IOPS]
Random Write 4KB (QD=32) : 0.034 MB/s [ 8.4 IOPS]
Test : 50 MB [N: 5.0% (5.8/115.8 MB)] (x5)
Date : 2011/03/01 20:25:41
OS : Windows XP Home Edition SP3 [5.1 Build 2600] (x86)
---------------------------------------------------------------------
Kingston Class 4 4 Gig
-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 (C) 2007-2010 hiyohiyo
Crystal Dew World : Crystal Dew World
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]
Sequential Read : 18.700 MB/s
Sequential Write : 4.277 MB/s
Random Read 512KB : 17.269 MB/s
Random Write 512KB : 0.677 MB/s
Random Read 4KB (QD=1) : 2.011 MB/s [ 490.9 IOPS]
Random Write 4KB (QD=1) : 0.006 MB/s [ 1.5 IOPS]
Random Read 4KB (QD=32) : 2.088 MB/s [ 509.7 IOPS]
Random Write 4KB (QD=32) : 0.016 MB/s [ 3.9 IOPS]
Test : 50 MB [N: 0.0% (0.0/3750.0 MB)] (x5)
Date : 2011/03/01 19:39:27
OS : Windows XP Home Edition SP3 [5.1 Build 2600] (x86)

Thanks for the quick reply and the numbers. I would assume the Patriot Class 10 16GB would have similar performance to your 8GB.
I am starting to wonder if the stuttering you are getting is from the Class 4 having too slow writes and the Class 10 is causing errors from being too fast for the Nook's card reader, or general compatibility. Maybe a Class 6 would be a better fit.
Which Froyo ROM did you use?

I used both 0.6.7 (packaged and "raw") and 0.6.8. I struggled with them enough to get the Market running and somewhat decent wifi speeds (though not stellar) and then threw in the towel. When I get bored I'll probably give the eMMC version a shot to see if it's all that and a bag of chips like they say.
And that's an interesting theory. I've not seen any one propose that a card could be TOO fast for the nook. I'd say it's far-fetched but I admit that I'm not an EE.

hello, i am also a newbie with Nook Color and am planning to root my nook. i am also looking for recommendations on what micro sd to purchase to root.
Here's my specs:
Software: 1.1.0
Model : BNRV200
Serial Number : 2010*************

I found another post that tried to start a thread for cards that worked, but the discussion died out. However, it did list a good number of success/fail rates.
From computerpro3:
Known Good
16GB Class 4 Patriot - 5.9, 6.6, 6.7
8GB Class 6 Lexar - 6.6, 6.7
8GB Class 6 Wintec - 5.9 (untested 6.6 and 6.7)
4GB Class 2 MicroCenter brand - 5.9, 6.6, 6.7
4GB Class 6 Transcend - 5.9, 6.6, 6.7
4GB Class 6 Adata - 5.9 (untested 6.6 and 6.7)
2GB Class 4 Sandisk - 6.6, 6.7
Known Bad:
16GB Class 6 RiData - hangs on Android boot screen with 5.9, with 6.6 and 6.7 it boots but gets endless loops of force closes. Tried multiple cards, all brand new.
16GB Class 10 Patriot - same symptoms as above
16GB Class 10 Wintec - same symptoms as above
16GB Class 6 Transcend - same symptoms as above
16GB Class 10 Adata - same symptoms as above
Click to expand...
Click to collapse
It looks like the Nook just doesn't like 16GB cards for the most part, and I haven't found a completely positive review of a Class 10 card. Perhaps that is a Nook hardware issue (buffer overrun by too much data from card at once), flaws in card construction, or an issue with the ROM and specific cards.
I was going to go with a Patriot Class 10 something, but swoozle's stutter scared me, so I went with a cheap card to at least learn on. Wintec Class 6 8GB is on sale today from Newegg for $11 shipped. If it doesn't work, I can throw it into my photo frame. People seem to like it though. One review notes it having class 10 speed.
http://www.newegg.com/Product/Product.aspx?Item=N82E16820161404
I plan on running eMMC once I get my card.
Swoozle, please let us know if the stutter goes away with eMMC on your cards.
Thanks again.

What SD class does D3 supports?

Ive seen 32gb MicroSD..but with class 4. are these ok for D3 or do we need class 10?

I've got a class 4 32GB card in mine and it works just fine. As far as I know it even records 1080p video at that speed. 32GB is the max that it will support as it only supports SDHC and anything over 32GB is SDXC.

I bought a Lexar brand Class 10 (32 gig) MicroSD from Amazon, and things don't load as fast as I thought they would. I had previously used this card in my HTC Desire Z and noticed that my Gallery would load very slowly. I thought maybe it was the Gallery or the ROM I was using or whatever... but then when I moved to my Motorola XT860 (Canadian Droid 3), I noticed the same thing. The gallery loads images / thumbnails very slowly, and sometimes when I take pictures with the camera, the image doesn't fully write to the card (the thumbnail for the picture will show half the picture, and the other half of the picture will be corrupted garbage). Even when I switched my phone over to the Chinese ROM it behaves exactly the same.
I'm thinking the Lexar MicroSD is at fault here... but I would like to continue testing by getting a new one, hopefully made by a better manufacturer/brand.
Hope this helps.

I have the Patriot 32Gb class 10. Gallery works fine with me, even if I have a lot of pictures on it. The only problem I have is with Spotify. When it downloads songs for offline usage, it would whine about the sdcard being corrupt/full even tho it works fine.

LaZiODROID said:
I bought a Lexar brand Class 10 (32 gig) MicroSD from Amazon, and things don't load as fast as I thought they would. I had previously used this card in my HTC Desire Z and noticed that my Gallery would load very slowly. I thought maybe it was the Gallery or the ROM I was using or whatever... but then when I moved to my Motorola XT860 (Canadian Droid 3), I noticed the same thing. The gallery loads images / thumbnails very slowly, and sometimes when I take pictures with the camera, the image doesn't fully write to the card (the thumbnail for the picture will show half the picture, and the other half of the picture will be corrupted garbage). Even when I switched my phone over to the Chinese ROM it behaves exactly the same.
I'm thinking the Lexar MicroSD is at fault here... but I would like to continue testing by getting a new one, hopefully made by a better manufacturer/brand.
Hope this helps.
Click to expand...
Click to collapse
Are you using the stock gallery app? If so, try using "Quickpic" its free in the market and loads everything MUCH faster than the stock gallery.
If you are worried it may be the card, use a card reader to test the speeds on your computer. There are a few free applications out there that will do this.
I am using a Kingston 16gb Class 4 card in my XT860, same as the one I used in my Desire Z and haven't had any issues. Though I haven't tried to record any 1080P video yet... 720p doesn't have any lag but the write speed may be a bottleneck for the 1080 video.
I ran a multitude of tests on my Kingston class 4 and it regularly had a write speed of 6mb/s+, which is the minimum speed of a class 6 card. Some people aren't fans of Kingston but I've used a few of their micro SD cards and they have always had good results for me.

Thats a good idea. Ill test the read/write speed on my pc. Ive yet to find an sd card tester app in the market that will work with this rom (stock chinese ME863 rom on gingerbread 2.3.5, rooted)
Thanks!
Sent from my ME863 using XDA App

i will go for a 16Gb class 10 Kingston card, instead of a 32gb class 4 A-data.
speed 10 is more important than 16gb at class4.

linuxgator said:
32GB is the max that it will support as it only supports SDHC and anything over 32GB is SDXC.
Click to expand...
Click to collapse
Even though they are really expensive at the moment, 64GB micro SDXC cards have been confirmed to work in most Android devices. These cards come formatted by default with the exFAT file system which is unrecognized by Android but Android will format it to FAT32 and all 64GB are accessible. FAT32 has a limit of 2TB, but modern versions of Windows won't format FAT32 over 32GBs. They will still read/write >32GB FAT32 drives just fine.
By the time these cards come affordable Android will probably have exFAT support by default.

Speed issues = return?
This may not really be related, but say I buy a Class 10 card of any size and am getting terrible transfer speeds. That's grounds to return it, right?

I tested my Lexar Class 10 32 gig and some no-name 2 gig on my PC. These are the results. I would appreciate it if any of you could try the same on your card(s) and see how they compare to mine?
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}

That is on your computer. I think the real question here is whether the Droid 3 can read/write at a fast enough speed to take advantage of faster cards. Speed tests on a PC are going to depend on the card reader being used.

Was trying to rule out possible defect with my 32gig. Its pretty bad on my phone. Most photos i take dont write, sometimes half-write. Overall its sluggish. I blame the ME863 rom but im kinda stuck with it for now. For now i just have it set to store photos/videos on the internal flash.
Sent from my ME863 using XDA App

32GB Patriot Class 10

Very interesting.... thanks Eksempel!
Sent from my ME863 using XDA App

Has anyone tried changing their cache size to see if it improves xfer speeds?? There was a tutorial on the homepage.
Also I'm considering on class4 vs class10 32gb card, is it woth getting the faster card? I want to stream 1080p through the hdmi if people could test this then I'd appreciate the results

Changing the cache size probably helps in Android, but not when the sdcard is mounted to the PC. Not sure the phone even has 1080p output via the HDMI (shoot me if I'm wrong), but I can get it to play 720p .mkv files without video stuttering.

Sandisk 32 GB Class 4
Sandisk 32 GB Class 4
Nothing fancy, but works like a charm.
I used a 32 GB "Noname" Class 10 before and I had lots of broken files after a days use....
-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 x64 (C) 2007-2010 hiyohiyo
Crystal Dew World : http://crystalmark.info/
Sequential Read : 20.095 MB/s
Sequential Write : 4.880 MB/s
Random Read 512KB : 19.376 MB/s
Random Write 512KB : 1.455 MB/s
Random Read 4KB (QD=1) : 2.822 MB/s [ 689.1 IOPS]
Random Write 4KB (QD=1) : 1.463 MB/s [ 357.2 IOPS]
Random Read 4KB (QD=32) : 2.973 MB/s [ 725.8 IOPS]
Random Write 4KB (QD=32) : 1.249 MB/s [ 304.8 IOPS]
Test : 50 MB [I: 0.0% (0.0/29.7 GB)] (x5)
Date : 2011/12/03 0:13:18
--------------
Sandisk 16GB Class 2
-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 x64 (C) 2007-2010 hiyohiyo
Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
Sequential Read : 20.070 MB/s
Sequential Write : 11.810 MB/s
Random Read 512KB : 19.676 MB/s
Random Write 512KB : 2.613 MB/s
Random Read 4KB (QD=1) : 3.760 MB/s [ 917.9 IOPS]
Random Write 4KB (QD=1) : 0.023 MB/s [ 5.5 IOPS]
Random Read 4KB (QD=32) : 3.824 MB/s [ 933.6 IOPS]
Random Write 4KB (QD=32) : 0.035 MB/s [ 8.5 IOPS]
Test : 50 MB [I: 90.1% (13.3/14.8 GB)] (x5)
Date : 2011/12/03 0:42:59

I have had a 32gb pny class 10 since july. The speed is a little lower then expected, but the real problem is data corruption. I lose several files each day(found in the LOST.DIR) and I'm thinking its due to being class 10. From what I've read, the class 10s have problem with the random sequential read/writes (er something like that, don't quote me). Anybody else losing files on a class 10 card or is it just me?
Sent from my DROID3 using XDA App

have you tried puting games or applications on card? when i do that, i lose that game..until a restart the phone. and then i lose another game. and so on...

jweber228 said:
I have had a 32gb pny class 10 since july. The speed is a little lower then expected, but the real problem is data corruption. I lose several files each day(found in the LOST.DIR) and I'm thinking its due to being class 10. From what I've read, the class 10s have problem with the random sequential read/writes (er something like that, don't quote me). Anybody else losing files on a class 10 card or is it just me?
Sent from my DROID3 using XDA App
Click to expand...
Click to collapse
I experience the same problem, but it's really strange because this never happened on my Blackberry Torch before. I didn't have any instances of data corruption. I also think it's got something to do with reading the files, since I'm really not doing any writes to the disk.

Anyone tried a 64GB SD?

Apparently these new 64gb SDXC cards work in some, if not many SDHC devices that do not officially support SDXC. I'd love to put my whole mp3 collection (40gb) and still have room for a handful of movies.
Probably going to get one for my Bionic, but if I know it'll work on the Nook as well I'd get two right off the bat.

Null
---------------------------------
Sent from my LG Optimus V using Tapatalk

koopakid08 said:
It will not work. Nook like almost all phones only supports up to 32GB.
---------------------------------
Sent from my LG Optimus V using Tapatalk
Click to expand...
Click to collapse
It only documents compatability with up to 32 GB... but that does not mean it is not capable of using the 64... this has been common in "computer" technology... they will advertise compatability with the largest drive available at the time.. but along comes something bigger... sometimes it works... sometimes it don't.
Bottom line is... we won't know if the nook color can use the 64 GB sdxc until someone tries.
To the OP.... if I were you I'd try it in the nook first... if it works then you can get another (and let us know either way)... either way you can reformat it to work in your Bionic anyway.

Doesn't it depend on the number of address lines that the uProcessor has (or at least has enabled/available)? A look at the device specifications may actually tell for certain how much memory can be addressed by the NC.
DizzyDen said:
It only documents compatability with up to 32 GB... but that does not mean it is not capable of using the 64... this has been common in "computer" technology... they will advertise compatability with the largest drive available at the time.. but along comes something bigger... sometimes it works... sometimes it don't.
Bottom line is... we won't know if the nook color can use the 64 GB sdxc until someone tries.
To the OP.... if I were you I'd try it in the nook first... if it works then you can get another (and let us know either way)... either way you can reformat it to work in your Bionic anyway.
Click to expand...
Click to collapse

gsutton said:
Doesn't it depend on the number of address lines that the uProcessor has (or at least has enabled/available)? A look at the device specifications may actually tell for certain how much memory can be addressed by the NC.
Click to expand...
Click to collapse
The SD card is a block device, which means it's not directly addressable. It's not a matter of the number of address lines on the uProcessor. It's a matter of if the software driver can issue the correct commands to get to all the data since the bus interface hasn't changed. See here
Frank

http://www.google.com/url?sa=t&rct=...K6vI1q&usg=AFQjCNGFn-QDxzO3iGCh1RuqeplfGapGKw
As I said, it seems many phones that do not "support" SDXC still will mount and use the full capacity of these new 64gb cards if you format them on the phone.
So there is a good chance they will work, but not for sure, especially on a low end hardware spec like the Nook Color. But it seems even the original Nexus and early Motorola Droid phones will use them, so the Nook might too.

Thanks for the response and for the link. Guess I need to research before I provide misleading comments.
frankusb said:
The SD card is a block device, which means it's not directly addressable. It's not a matter of the number of address lines on the uProcessor. It's a matter of if the software driver can issue the correct commands to get to all the data since the bus interface hasn't changed. See here
Frank
Click to expand...
Click to collapse

I guess I gotta fork over $220 bucks to try out the Sandisk. There is a Kingmax 64gb card for $180ish, but I trust Sandisk.

40g, entire collection. Ah, to be noob again.
--------------------------------
Sent from my NookColor CM7.1

MISRy said:
40g, entire collection. Ah, to be noob again.
Click to expand...
Click to collapse
Whatever. I ripped my first mp3 while you were most likely in diapers.

Anyway, couldn't quite get myself to spend $220, so I got the Kingmax for $178. Hopefully it'll work as well as the Sandisk. I'll report back once I get it.

Sorry for resurrecting but do we have any updates on this? I've been seeing some pretty good deals on 64GB microSDXC lately and it would be great if they can be used on the Nook Color.

Someone is going to just have to bite the bullet and try it out. Until then all we can do is speculate really.
Sent from my NookColor using Tapatalk

I bought two Sandisk 64GB microSDXC cards a while ago and can confirm that they work for me. The card has to be reformatted with FAT32 but works flawless afterwards. I've formatted the cards in the devices.
I've used it with a Nook Color, Nook Tablet, Motorola Defy+, Huawei Ideos X3, and even in a Samsung Galaxy i7500. I've used it both with the stock rom as well as with cyanogenmod. Currently I'm using one of the cards to boot cyanogenmod 7.2RC1 from SD on my Nook Color.
My main use is in my Nook Color and Motoraly Defy+. I've experienced no problems so far.
Formating the card in the device takes a while and it looks like nothing is happening. You just have to wait. Once it's finished it mounts the card and you get a notificiation.

What class are they? Do you know the Sandisk part no.?

My cards are class 6 cards, the item# is SDSQY-064G-U46A. I don't know if the item numbers or cards vary in different countries. I bought mine in Germany.
There seems to be a newer version of the card with class 10. I haven't tested it since I currently don't need any more 64 cards but I wouldn't worry about compatibility.

leistungssurrogat said:
My cards are class 6 cards, the item# is SDSQY-064G-U46A. I don't know if the item numbers or cards vary in different countries. I bought mine in Germany.
There seems to be a newer version of the card with class 10. I haven't tested it since I currently don't need any more 64 cards but I wouldn't worry about compatibility.
Click to expand...
Click to collapse
Any chance of you running CrystalDiskMark on those cards and posting the results here or in this thread?
- Aerlock

You can download an app from the playstore called "SD booster" to help the read/write speeds if you experience lag on the larger 64 GB microSD card. It helps me out. There is links on google too where it has been bench-tested.
The link for this app can be found here. https://play.google.com/store/apps/details?id=de.mehrmann.sdbooster&hl=en. It reconfigures your caches for your microSD card to help speed up the read/write speeds.
You can pick up another app to bench test your read/write speeds also. Its called SD tools. https://play.google.com/store/apps/details?id=ales.veluscek.sdtools&hl=en
I used these tools to find the right cache size for my 64 GB card and have it performing as good as a stock 16 GB card with no modifications.

I did the benchmark with both cards. The first card was tested with my old notebooks internal card reader:
Code:
Sequential Read : 20.111 MB/s
Sequential Write : 8.460 MB/s
Random Read 512KB : 19.676 MB/s
Random Write 512KB : 2.405 MB/s
Random Read 4KB (QD=1) : 2.794 MB/s [ 682.1 IOPS]
Random Write 4KB (QD=1) : 1.280 MB/s [ 312.4 IOPS]
Random Read 4KB (QD=32) : 3.660 MB/s [ 893.6 IOPS]
Random Write 4KB (QD=32) : 1.397 MB/s [ 341.1 IOPS]
I tested the second card in my nook (booted from sd, connected via USB):
Code:
Sequential Read : 16.732 MB/s
Sequential Write : 7.148 MB/s
Random Read 512KB : 18.068 MB/s
Random Write 512KB : 2.559 MB/s
Random Read 4KB (QD=1) : 3.692 MB/s [ 901.3 IOPS]
Random Write 4KB (QD=1) : 1.404 MB/s [ 342.9 IOPS]
Random Read 4KB (QD=32) : 3.984 MB/s [ 972.6 IOPS]
Random Write 4KB (QD=32) : 1.428 MB/s [ 348.7 IOPS]
For comparison these are the results for the internal storage of my nook color:
Code:
Sequential Read : 17.543 MB/s
Sequential Write : 4.311 MB/s
Random Read 512KB : 16.842 MB/s
Random Write 512KB : 1.596 MB/s
Random Read 4KB (QD=1) : 3.624 MB/s [ 884.7 IOPS]
Random Write 4KB (QD=1) : 0.867 MB/s [ 211.7 IOPS]
Random Read 4KB (QD=32) : 3.803 MB/s [ 928.6 IOPS]
Random Write 4KB (QD=32) : 0.610 MB/s [ 148.9 IOPS]

Storage Benchmark 64GB vs 128GB

Like in other mobiles, it seems that the 128GB it’s faster that the 64GB version.
Carl commented that the 128GB UFS 2.0 storage performs much better than current microSD card implementations
Click to expand...
Click to collapse
Can you do this test in both versions (64GB vs 128GB)?
Androbench
A1 SD Bench
128GB
from Xiph-
My 3T 128GB Androbench results:
Sequential Read 420.52 MB/s
Sequential Write 163.69 MB/s
Random Read 118.59 MB/s
Random Write 73.59 MB/s
Click to expand...
Click to collapse
Maybe 64GB?
from Anandtech:
http://www.anandtech.com/bench/product/1816
OnePlus 3T
Sequential Read 292.28 MB/s
Sequential Write 156.98 MB/s
Random Read 22.25 MB/s
Random Write 24.67 MB/s
Maybe is the 64GB, and have less performance?
Click to expand...
Click to collapse

The old one (OnePlus 3 64GB)
AndroBench 3-5
Sequential Read 256KB - 408.71 MB/s
Sequential Write 256KB - 153.30 MB/s
Random Read 4KB - 137.62 MB/s
Random Write 4KB - 18.23 MB/s

From oneplus.net
OP3 & OP3T both use UFS 2.0
http://www.anandtech.com/show/10411/the-oneplus-3-review/3
In UFS2.0 NAND Speed doesn't change with Storage Capacity like in iPhone which uses NVMe SSD Technology
Click to expand...
Click to collapse

My 3T 128GB Androbench results:
Sequential Read 420.52 MB/s
Sequential Write 163.69 MB/s
Random Read 118.59 MB/s
Random Write 73.59 MB/s

OP3T uses NF2S vs 0P3 ext3.. which could/should explain faster write speeds..

Anandtech have:
http://www.anandtech.com/bench/product/1816
OnePlus 3T
Sequential Read 292.28 MB/s
Sequential Write 156.98 MB/s
Random Read 22.25 MB/s
Random Write 24.67 MB/s
Maybe is the 64GB, and have less performance?

I'm pretty sure it is F2FS on 3T. It was also mentioned during the AMA session. Besides, there is no such filesystem as NF2S.

F2FS on 3T -- EXT3 on 3

I need a androbench from OnePlus 3T 64 GB version and past here the result..

OnePlus 3T 64gb
Sequential Read 436.88 MB/s
Sequential Write 166.37 MB/s
Random Read 125.2 MB/s
Random Write 74.26 MB/s

Storage speed 64GB vs 128GB

Is there any good comparison between the two models in terms of storage speed?
PS.: I know a therad about this topic already exists but it's not clear (a user with 64GB model got higher benchmark scores than another user with 128GB model)

I asked a similar question before getting my phone and the speed should be the same. The only difference is the space obviously. If there is a difference in performance it's probably negligible.

Larger SSD's usually have better speeds, for whatever reasons. The 128GB might be slightly better, or on par.

Hi,
For what it is worth:
OnePlus 3T 64gb
Sequential Read 436.88 MB/s
Sequential Write 166.37 MB/s
Random Read 125.2 MB/s
Random Write 74.26 MB/s
Click to expand...
Click to collapse
OnePlus 3T 128GB
Sequential Read 420.52 MB/s
Sequential Write 163.69 MB/s
Random Read 118.59 MB/s
Random Write 73.59 MB/s
Click to expand...
Click to collapse
From users, I searched a bit more but nothing more on my side...
Source: https://forum.xda-developers.com/oneplus-3t/help/storage-benchmark-64gb-vs-128gb-t3506137 (maybe it's the thread that the OP refers but without posting a link so maybe it could be useful...), need some more accurate benches...

I was refering to that thread and it makes no sense that the 64GB model is faster

Well, I know flash memory is different than a standard HDD... I was going to say the reason that it might be a little slower is because there is more space to cover so it takes longer to read/write data, but technically it shouldn't matter with flash memory. Honestly I'm not sure, but my guess is every phone will get a little different benchmarks. Nonetheless the phone is very fast and responsive, so you shouldn't need to worry.

riccardoperu said:
I was refering to that thread and it makes no sense that the 64GB model is faster
Click to expand...
Click to collapse
Might be, or better should be matter of measurement accuracy.
Speaks for the high quality of the 64GB.