Summary:
I bought a Patriot 16GB LX Series Class10 MicroSD and had huge problems with it. Freezes etc.
After partitioning with FAT32 without LBA the Patriot Class10 is superfast, 14MB/s write speed under Android Froyo. LBA mode was the culprit.
I have not tested this over several days, but so far things seem to be fine.
Problem description:
Phone: Motorola Defy on Froyo Orange. Problem also exists with LG P500
The Patriot 16GB LX Series Class10 MicroSD seemed to lock up, apps were freezing. Speed tests with SD Tools from the Market also locked up.
The Patriot worked however fine when put into a card reader with a PC. Write speeds are consistently over 12MB/sec. I tested also with Check Flash, google for "chkflsh misha"
I reformatted with the official SDFormatter Tool V.2.0. from the SD Association. No go, same problem.
How to solve:
1. Remove existing partition on MicroSD and make a new partition with FAT32 without LBA mode.
I used the Check Flash low level initialization function for partitioning, google for "chkflsh misha"
2. Format MicroSD under windows, command line with:
format X: /fs:fat32 /a:32K
Click to expand...
Click to collapse
(DO NOT use SDFormatter from the SD Association to format as the program repartitions the MicroSD in FAT32 LBA Mode!)
With FAT32 no LBA 32k allocation size the Motorola defy blazes away with the Patriot 16GB LX. Write speeds + 14MB/s are shown by SD Tools.
Thoughts:
My humble guess is that the Motorola Defy accesses the MicroSD in non-LBA mode and that leads to problems if the partition is LBA. This is either caused by the MicroSD controller or the Defy.
I also suspect that various MicroSD problems of other phone/card combinations are caused by LBA partitions.
As far as I can see LBA is anyway superfluous as Android can only access 32GB SD Cards currently.
Cheers
Geejay
Usually class 2 and 4 cards are better for use with phones and for running OS's or apps off of. Class 10 cards are designed to have fast sequential write speeds, but sacrifice their random read/write speeds and access times to achieve their fast sequential speeds. It's because they they initialize the section of the card that they are about to write to, which gives great speeds in sequential writes, but will cause delays and freezes when doing things that need quick access to different parts of the card or tasks that will read/write small bits of data from different parts of card.
Many people assume that higher class cards are better, but it really depends on what you're using the card for. For digital cameras, higher class is better, but for cell phones, where you will running apps or parts of the OS are store and accessed from the card, you want a lower class with better access times and random read/write speeds.
Different cards are better for different tasks.
Thanks for your comments. I bought the card because it was the cheaper than Kingston, the only other alternative in that shop.
Here is an interesting article, with detailed info of what you mentioned.
Google for "Working Groups Kernel Consolidation Projects FlashCardSurvey", I cannot post links.
It seems that these Patriot cards are indeed linear write. The author mentions a superior SanDisk algorithm for access.
Interesting benchmark which seem to confirm this: google for "MicroSD card performance test results"
Looking at the table Kingston seems to be slower than Patriot.
In any case there seems to be an LBA problem with the Froyo/Patriot combo.
Yeah, Kingstons are terrible for access speed and random read/write from the tests I've done. I'll never buy a kingston again. I usually stick with Sandisk... it's usually worth any extra money they cost to know you're getting a quality card. I have 8 different sandisk cards now... 2 32gb, 2 16gb, 2 8gb, 1 6gb and 1 4gb, and haven't had a problem with any of them and all except one has worked flawlessly with WP7 and all have worked great running android off of on my HD2.
I was interested in buying this patriot memroy card, is there anyone who can tell me whish access time ? ( you can use hd tune 2.55 to check it ! )
please delete
HD2 with cLK and clockworkmod recovery on Patriot 16gb class 10
geejay2 said:
Summary:
2. Format MicroSD under windows, command line with:
With FAT32 no LBA 32k allocation size the Motorola defy blazes away with the Patriot 16GB LX. Write speeds + 14MB/s are shown by SD Tools.
Click to expand...
Click to collapse
Thanks so much for the idea. Seems to have fixed the problems I was having with the card. My problem is that the ext3 partition is automatically formatted by the recovery program I'm running (clockworkmod 4.0.0.0), so I can't do the same for that partition.
I'm still not getting great write times, but read times are good for sequential:
-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 (C) 2007-2010 hiyohiyo
Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]
Sequential Read : 12.588 MB/s
Sequential Write : 3.915 MB/s
Random Read 512KB : 16.033 MB/s
Random Write 512KB : 1.103 MB/s
Random Read 4KB (QD=1) : 1.782 MB/s [ 435.1 IOPS]
Random Write 4KB (QD=1) : 0.129 MB/s [ 31.4 IOPS]
Random Read 4KB (QD=32) : 2.024 MB/s [ 494.2 IOPS]
Random Write 4KB (QD=32) : 0.111 MB/s [ 27.1 IOPS]
Test : 100 MB [H: 11.5% (1.6/13.9 GB)] (x9)
Date : 2011/09/20 14:23:51
OS : Windows XP Professional SP3 [5.1 Build 2600] (x86)
Thanks!
Just singned up to say thanks.
Just followed your instructions for an 8 GB Verbatim Class 10 card. Seems to work. It was laggy and buggy before that.
Thanks
Wow! This LBA thing seems complicated, is it really needed...? Heard that formatting in different cluster sizes can solve the problem already, maybe this LBA thing is not needed...?
BTW, Chkflsh doesn't seem to have a partition function at all...?
Cheers.
And how do we format in non LBA mode? I cannot find any instructions anywhere...
Please, help!
florin20032003 said:
And how do we format in non LBA mode? I cannot find any instructions anywhere...
Please, help!
Click to expand...
Click to collapse
My thoughts/problem as well...
Mac option for non-LBA formatting??
Hello everyone...
Was wondering if anyone knew of a Mac option to format in non-LBA mode. Does the internet formatting utility is the Mac OS ("Disk Utility") use LBA or no??
THANKS!!
Related
I've flashed back to standard FroYo with RUU -RUU_Bravo_Froyo_HTC_WWE_2.29.405.5_Radio_32.49.00.32U_5.11.05.27_release_159811_signed - and all seemed well but I've noticed that when I now move an app over to the SD card using the standard FroYo APP2SD feature the app works fine until I reboot my phone and then it just has a standard android grey icon so it knows its on the SD - but it won't work again...
It's as if my SD card is mounted all the time...
Any thoughts on what I can do to fix this?
How frustrating...
I think this might be down to the new SD card I put in my phone...
Kingston 16GB class 6...
switched back to the SanDisk 8GB class 2 - and apps2sd seems to be working.
google sky maps is still on there after two reboots anyway which the 16gb wasn't.
Does anyway know of any tools to check the SD card for faults before I try and send it back?
someone suggested a chkdsk on it...
chkdsk from windows recovered a FOUND.000 folder with 1530 File(s) 2,805,137,408 bytes of file fragments!
any one have any suggestions of decent SD card checking tools or such or should I just try and send it back?
[edit: just noticed that the 1530 were all my photos and contacts on the SD card ]
[edit2: Anyone know if these tools are any good:
http://www.softwinter.com/storagetools.html ]
[edit3: just saw its for WM only]
done a full windows7 format on it (instead of a quick) and it might, might just be working...
got RAC Traffic on the SD and managed to do a reboot and its still there - which is further than I got before...
nope - still not working - second reboot and it has gone...
interestingly though if i unmount and re-mount the SD it does come back and work...
tried the above again - rebooting (not there) - unmount - re-mount - still not there - annoying...
Sd card test
h2testw: http://mympx.org/Downloads/p13_sectionid/2/p13_fileid/13
results for 1024mb:
Code:
Warning: Only 1024 of 15986 MByte tested.
The media is likely to be defective.
486 MByte OK (995328 sectors)
538 MByte DATA LOST (1101824 sectors)
Details:0 KByte overwritten (0 sectors)
0 KByte slightly changed (< 8 bit/sector, 0 sectors)
538 MByte corrupted (1101824 sectors)
0 KByte aliased memory (0 sectors)
First error at offset: 0x000000001d6b8000
Expected: 0x000000001d6b8000
Found: 0x0000000000000000
H2testw version 1.3
Writing speed: 1.79 MByte/s
Reading speed: 5.56 MByte/s
H2testw v1.4
I'm going to guess from that it's broke'd
A lot of guys on this site have had problems with Kingston cards (you can search for the other topics). Sandisk seems to make good cards, and on the advice of several people here, i purchased a 16gb class 6 A-DATA card and am quite happy with it so far.
Yeah, the more I had problems trying to get it sorted the more research I did into it - Patriot / A-Data / SanDisk seem like the best choices for MicroSD cards ...
I thought Kingston were a pretty decent manufacturer too!
I'm a bit frustrated as I wanted something bigger than the 8gb I had currently, and something that'll last a little while - 16gb/c6 seemed perfect for a decent price too - backed up and wiped my phone...
8 hours later I am flashing back to stock only to spend another few hours confused before going back to my 8gb/c2
What is the differences with
Apps2SD vs Data2Whatever vs data2SD etc... or if there are anymore that i may had missed out.
Which one is the best to use and most efficient to use?
Are there any instructions for the best way to free up internal memory? as it is near enough full having 15mb remaining.
HTC-Desire
Rom - Running GingerBread 2.3 GingerVillain 1.1
I can't really explain the differences too well, but there's loads of threads to read about it if you look.
For me, using Gingervillain, I find A2SD+ to be great.
I have a 750MB ext3 partition on my SD card, of which I have used approx 250MB (approx 35 - 45 apps plus the Dalvik cache), so I have loads of this left to use, meanwhile my actual free phone memory stands at about 110MB.
Gingervillain has A2SD+ built in, so if you make sure all of your apps are saved to internal memory, not SD card, they'll actually be on the ext partition of your SD card.
I followed this advice to move the Dalvik Cache to the SD card:
"For those off you who do not understand any off all the above about moving dalvik cache it is as follows. You got two options to move your dalvik-cache.
the first requires you to have the Android-SDK (or at least ADB) installed on your computer. If you don't have this, leave it.
What you do is as follows: in windows command prompt:
> adb (-d) shell
a2sd cachsd
you will see some rolling text and phone will reboot.
The second option is on the phone itself. This is the fastest way in my opinion. For this you need to download the app: Android Terminal Emulator from the market.
Start up terminal after download and punch in as follows:
# su
after that terminal will ask for superuser permissions. Allow these.
# a2sd cachesd
and again some rolling script and phonme reboots
I can't break it down easier then this.
Good luck
MOVING BACK TO PHONE:
If you are using Darktremor A2SD, just enter an ADB Shell, or terminall emulator on phone, enter su and type a2sd nocache."
Hope this helps
: )
Woww... my click on right app2sd app. Thanks for pool. keep sharing.
Hi!
I´m using RCMixHD Data2ext version, it´s very fast and smooth.
Also i tried A2SD+ and Data2WE, but with A2SD+ ihad to less free space and Data2WE was very laggy.
When using Data2ext it´s recommended a class 6 SD Card (I´m using class 10)
With class 2 or 4 you can get problems.
Data2SD performance
I'm using Data2SD with the Gingerburst ROM on my HTC Desire. I've just got a Vivacity and having looked into App2SD I'm going to load Data2SD on that too.
Data2SD is an elegant solution which uses the ext4 filesystem to create a single large internal memory space of over 2Gb (2Gb is the maximum size of the ext4 partition on the SD card, plus the internal partition) which the OS addresses seamlessly. The two separate partitions are addressed by the OS as a single ext4 space. So no need to move apps around, or problems if the wrong apps are moved. Speed is fine, but benefits from a fast SD card - as I'd expect any apps run from SD cards would irrespective of the software solution.
I recently upgraded from a 4Gb Samsung Class 6 micro-Sd card, to a 16Gb SanDisk Class 4 card. I have around 2Gb of internal memory, 70% of which is still free and performance is good - better since I got the SanDisk.
Class isn't a good guide to performance since it relates to the sequential access speed - continuous access typically relevant to big files like video or images. High sequential speeds seem to be achieved at the expense of lower random speeds and many Class 10 cards have very low random access speeds for small files. Phone apps frequently access small files therefore random access is a better guide to performance in a phone and I would avoid cards with any low performance in this area.
Here are the results for my SanDisk Class 4, whose lowest random read/write speed is the highest I could find:
-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 (C) 2007-2010 hiyohiyo
Crystal Dew World :
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]
Sequential Read : 22.204 MB/s
Sequential Write : 4.845 MB/s
Random Read 512KB : 20.493 MB/s
Random Write 512KB : 0.538 MB/s
Random Read 4KB (QD=1) : 3.456 MB/s [ 843.8 IOPS]
Random Write 4KB (QD=1) : 1.337 MB/s [ 326.4 IOPS]
Random Read 4KB (QD=32) : 3.111 MB/s [ 759.6 IOPS]
Random Write 4KB (QD=32) : 0.499 MB/s [ 121.8 IOPS]
Test : 1000 MB [G: 0.0% (0.0/14.8 GB)] (x5)
Date : 2012/02/08 12:59:34
OS : Windows 7 Home Premium Edition SP1 [6.1 Build 7601] (x64)
Both my Samsung 4G Class 6 card, and the SanDisk outperform the unbraanded 2GB card which came with a T-mobile Vivacity I recently bought.
My SanDisk Class 4 is slightly quicker in use than my SanDisk Mobile Ultra - the phone boots and most apps load more quickly - around 10%.
Whichever approach you take to extending the internal memory of your Android, it's going to benefit from a faster random access memory card - I'd be interested to see if anyone else has found a card with better results.
Please use the Q&A Forum for questions &
Read the Forum Rules Ref Posting
Moving to Q&A
In GB, I really enjoyed Data2Whatever but unstable in ICS Rom.
I'm using Apps2SD on Sandvold's ICS until now.
Hi All,
I am running teppic74's rooted, A2SD+ but otherwise stock HTC/Sense/Froyo ROm.
I have a Lexmark, 16GB Class 6 SD card. It came from a reputable source, and I've tested it thoroughly on my PC and it really does perform above and beyond class 6 (ie, 6MB/s sustained write).
However, when I have my desire connected to my PC over USB, and copy files to the SD card, I sustain about 0.75 MB/s
I don't know why it's so slow.
Does anyone else have this problem?
thanks
Slip
Please use the forum search next time, what you describe is a well-known bug seen on latest kernels.
Strange. Have you compared USB transfer speeds on different ROMs?
I have a class 2 sd card that does maintain a decent 2MB/s transfer.
GingerVillian and Miui Roms tested.
I read somewhere that using A2SD/+, D2EXT/W etc does cause sd card to read/write slower over time.
This is it, i've nothing to compare against. I've been through several roms recently and i didn't bother syncing multiple gigabytes of music (keep repartitioning my sd card) until the last couple of days.
Reluctant to switch roms again do to the hassle of installing all my apps etc.
Changing the SD readahead speed makes no difference. "SD Tools" from the market measures write speed at a pretty constant 4 MB/s - but still i can only write over USB at less that 1 MB/s. Makes me think that the problem is with USB rather than SD.
Initial testing in Windows
I have done some testing with this and I really think this is a bug or something that NEEDS to be fixed.
I have a 8GB SDHC Card. It's A class 4 card, meaning transfer speeds should never be lower than 4 MB/s.
When I put my SD Card in my SD slot of my computer using the little adapter that came with it, the transfer speeds are awesome. Now they were as follows:
Read: 6,4 MB/s
Write: 1,1 MB/s
These values are atrocious so I searched for possible reasons. I found out Windows Vista used a very low cluster size when formatting the SD card, it used 1024KB (I think). After manually choosing to format using 64 KB clusters and testing again, this is what I got:
Read: 19 MB/s
Write: 9,2 MB/s
Explaining Cluster Sizes
Now making the cluster size this big has a disadvantage. The size of every file on the card will be rounded up to the nearest 64kb. This is because of the way the SD cards works, which I'm not going to explain here.
This means that a lot of space will be wasted. Read about it in the link to Wikipedia. In short:
Large cluster size ->Less usable space, faster transfer rates.
Now I put my cluster size at 16 KB as a compromise between storage loss and speed gain, resulting in these speeds:
Read: 17 MB/s
Write: 8,9 MB/s
Testing in Android
I put my SD Card back into my Android phone, and plugged in the USB Cable. I copied some files to the SD Card. Guess what:
Read (Max, not average): 2 MB/s
Write (Max, not average): 1,44 MB/s
Which does not make any sense at all. I used the "SD Speed Increase" app to change the cluster size within Android (which is 128kb by default) and it still did not help.
This is a serious issue in my opinion, I lost some data and want to restore a backup, If I leave my SD card in my phone it would take 23 hours according to Windows! If I put my SD Card in the computer, the same task only takes 12 minutes!
Workaround
While searching around on XDA I found a workaround to this problem. This is by no means a real fix, but it enables you to get proper read and write speeds without the need to take the SD Card (and thus the battery on some devices) out. Reboot your phone in recovery. I have CWM-AlphaRev Recovery, but it should work for other recoveries too.
In AlphaRev recovery, go to
"mounst and storage"
"mount USB Storage"
The phone will be connected to the PC, and what do you know?
Read: 17MB/s
Write: 8,7 MB/s
Which is basically the same as I would get if I wouldn't have used the phone at all!
Sources:
SD Speed Increase:
https://market.android.com/details?id=com.sdincrease.it&feature=search_result
Measure SD speed from within Android:
https://market.android.com/details?id=ales.veluscek.sdtools&feature=search_result
Information on cluster size:
http://en.wikipedia.org/wiki/Data_cluster
SD Card Class rating:
http://en.wikipedia.org/wiki/Secure_Digital#Speed_Class_Rating
Reboot into recovery for proper speeds:
http://forum.xda-developers.com/showpost.php?p=11671350&postcount=2
just flash a different kernel
Tried many many kernels, not one really helped unfortunately
Being reminded about this issue yesterday evening while copying over a bunch of music, I went for a search again, and stumbled across this post:
http://forum.cyanogenmod.com/topic/15003-ultra-slow-usb-transfer-speed-on-desire/ which lead me to this post: http://forum.xda-developers.com/showthread.php?t=883598
The problem came with the .37 kernel, but wasn't fixed in the .38 kernel apparently. The Manu kernels are based on .35, so from what I've read it will solve the slow write speed. Since I'm at work atm, I can't write to USB (security policy ), so couldn't test it yet.
Right, using the Manu kernel (havs-axi), I can now transfer data (music...) at 1,6MB/s instead of 0,75MB/s. Not a significant increase, but at least an increase I can live with.
Hi well respected xda community!
Recently i faced with a very uncommon card reading/writing problem. Here is the story:
I'm using a Sandisk Micro SDHC Class 4 8Gb card with my HTC Legend (Android 2.2)
When i'm trying to write/copy data to the card i got the "unexpectedly removed SD card" message. Of course at first i thought it just need a format. I did it with default windows 7 format (FAT32 default allocation unit size) but nothing changed.
Here comes the interesting part:
It's not a common card failure, when the card connected to the PC with SD adapter+card reader i can fully use it, write, read, and copy without errors. I made some analysis with proper programs and no bad sector was found. Everything went fine. If i copy data to the card from the PC with card reader its functional with the phone. I can read pdfs, listen to music from SD Card but! if i try to copy an app from the phone or write random data on the card it's get "removed" and i get the error. It's the same on Samsung Monte.
I tried to format it with NTFS, FAT32 32k,16k, 8k, 4k allocation unit size. Tried several applications like: SD Formatter 3.1, MiniTool Partition Wizard etc. to format. And of course i did format with the phone.
Here is what may help:
1.) A good and trusted memory card analyzing program.
2.) Format tips and tricks for android, HTC. (Maybe some awesome free format program will do the trick)
3.) A fully functional microSDHC 8 Gb class 4 - Sector, Cylinder and allocation size log file. (So i can format mine with the exact same numbers.)
4.) A Genius who knows whats the solution If it's you, please let me know!
Later i'll attach the log file from the analyzer and some information about the card. (Currently i'm at work.)
///Sorry if posted in the inappropriate topic, but found this the most related.///
Solving my own problem.
As soon as i get home i'll try this program:
http://www.makeuseof.com/tag/chkflsh-checks-your-flash-drives-on-windows/
And this:
http://crystalmark.info/software/CrystalDiskMark/index-e.html
Also, i found and interesting post:
http://forum.xda-developers.com/showthread.php?t=1010228
Maybe i have to change something with the LBA thingy.
found it
I found a sector error on the memory card. Used Flash Drive/Card Tester and Chkflsh programms. Mystery solved
Closing thread.
Hi guys I just purchased the Samsung 64gb micro sd card and I'm having some issues.
I just copied over ~45 gb of FLAC music to the sd card using two different methods. 1) Taking the sd card out and using a sd to usb adapter and 2) plugging the phone into my computer via usb.
Both times all of the files copied over without any error or interruptions and after I put the sd card in my phone and booted it up I can't detect any of the files from Shuffle or ES File Explorer
So I plugged the sd card back into my computer and both times all of the folders are empty and none of the FLAC files are present. I ran diskcheck on the sd card and it said it fixed all of the errors but all of the FLAC files are still missing... Now I just have a folder called FOUND.000 on the root with a bunch of .chk files in it that are about the size of an album of FLAC music (~300mb)
What is going on...?
Jessooca said:
Did you by any chance get an error when copying the files over ? Such as a semaphore error? Were you using Windows to copy files or teracopy?
Sent from my SPH-L710 using xda app-developers app
Click to expand...
Click to collapse
I used Windows Explorer to copy the files over. It looks like I have either a counterfeit or defective card. I ran SD Insight and H2testw on it and both returned obviously suspicious results.
sdinsight:
Manufacturer: Invalid (0x00)
OEM/Application ID: Unknown
Product Name:
Product Revision: 0.0
Serial #: 0xbd0c
Manufacture Date: Jan 2014
CRC7: OK
Size: 67GB
SD Card Specification: SD Physical Layer Version 2.00
CPRM Security Support: No Securit
Click to expand...
Click to collapse
H2testw:
Warning: Only 63907 of 63998 MByte tested.
The media is likely to be defective.
3.5 GByte OK (7486168 sectors)
58.8 GByte DATA LOST (123395368 sectors)
Details:41.5 MByte overwritten (85104 sectors)
0 KByte slightly changed (< 8 bit/sector, 0 sectors)
58.7 GByte corrupted (123310264 sectors)
60 KByte aliased memory (120 sectors)
First error at offset: 0x00000000c65db000
Expected: 0x00000000c65db000
Found: 0x0000000000000000
H2testw version 1.3
Writing speed: 3.80 MByte/s
Reading speed: 6.64 MByte/s
H2testw v1.4
Click to expand...
Click to collapse
Here is a copy of the email I sent the eBay user:
I have reason to believe the Samsung 64gb micro sd card that you sold me is counterfeit.
I first had a hunch this item was counterfeit when I copied 45gb of data to the card two separate times just to have it all erased/corrupted immediately after putting it in my phone.
After this happened, I decided to download an Android app called sd insight to see if the card was fake or not. These are the results I received from running the app: http://pastebin.com/RfG0JREq
As you can see in that log file, the manufacturer, product name, revision number, etc are all null. This led me to believe that the card you sold me was certainly counterfeit. If this was a legitimate card the entries would have reported things such as SAMSUNG and MB-MGCGB/AM. (The supposed make and model of this sd card) Additionally, there would be at least 1 revision to this card to counter the data corruption issues that was occurring to S3 and S4 smart phones in 2013 since it was manufactured (supposedly) in January of 2014.
In order to be sure for certain before I contacted you with this claim, I used a program called H2testw. H2testw is a program that writes data files to your sd card and reads them off until every sector has been tested. If corruption occurs you have an sd card error. Additionally, you can see the actual size of the sd card and many other cool things. Here is the log file that the program returned to me: http://pastebin.com/X8e0R6TM
As you can see, this card is actually only 3.5GB instead of 62.4 like reported by Windows Explorer. This leads me to believe this card has been hacked to report the incorrect capacity size. 58.8GB of data was lost because it was written to sectors which actually don't exist... This is proven by the hex address given by the location of the first error.
As you can see, it expects to encounter 0x00000000c65db000 but instead encounters 0x0000000000000000 when trying to copy data to that specific location. This is because that location doesn't exist....
Finally, you can see that the writing speed is only 3.8mb/s instead of 7mb/s and the reading speed is only 6.64mb/s instead of 24mb/s. This is another clear sign of a fraudulent item.
You sold me a class 4 3.5GB sd card in disguise of a class 10 64gb sd card. I would like for this item to be replaced with a legitimate Samsung 64gb class 10 micro sd card at no extra expense to me. This includes reimbursing my return shipping fees if you desire the item to be returned to you before continuing.
Click to expand...
Click to collapse