May I know which brand are you using?
Thx
Hi, I apologize for the mistake in my previous post, she is currently using a regular SanDisk class 4 card, she had previously used the Mobile Ultra series class 10 though before she decided to use it in her T989 instead since she was having boot loop issues with the regular class 4.
I bought it from Best Buy in August when it was on sale for $40.
She had 1 issue with the card though, when she was in the process of moving the files and folders off of her pc, where she had copied the contents of the class 4 sd card she previously used in her SGS2, to her new class 10, SD card.
All was fine, until she had copied her NANDROID back up folder which was about 3 or 4 gb in size, everything else had copied over just fine.
When she copied her NANDROID back up folder to the Mobile Ultra card from her W7 laptop, where she had previously copied the class 4 card, and after one file couldn't be copied, the card became corrupted, and she couldn't read the card in her computer, phone or tablet, and formatting it didn't work at all. I even tried in my own device, and although I was able to read it, when she couldn't, it wouldn't format in my phone or tablet either.
In Windows, it said something about the file name being too long, and it would not let either of us rename or delete the file because it said that it was write protected, (it wasn't) and then sometime after that, the file name had some gibberish and was 6gb in size and we could not format it at all.
This happened with both sd cards, and so, I took them back to Best Buy and got another Mobile Ultra card that she now uses in her phone, and since then she hasn't had any issues. I also bought a USB card reader, and used the new card with it just in case the issue was with the sd card adapter it came with.
That said though, the Mobile Ultra cards, worked just fine in her T869, it was just one file that was inside the NANDROID back up folder that corrupted both cards.