My samsung on 7 doesn't recognise sd card properly

[AC Question]

I am using Samsung on7.I used 16GB sd card earlier and it ran smoothly. But now I replace it with a 32 GB Sandisc sd card and my problems starts.the sd card is shown and also all the transfer is done normally.But many apps don't recognise it and I can not make the sd card as default storage of those apps.A sub-category is created as 0403-0201 which is not found in the sd card.Whenever I remove the sd card or switch off my mobile,all the installed apps in the sd card going out and I have to reinstall those.I am totally confused and find no way to solve the problem.

 

[B. Diddy]

Welcome to Android Central! The SD card could be corrupt, defective, or counterfeit. Install SD Insight to see if the card is genuine or counterfeit. Counterfeit cards are programmed to report more storage than they actually have, and if you try saving more than the card can actually hold, then files can start getting corrupt.


If it's a valid card, then go to Settings>Storage, Unmount the card, remove it, and insert it into your computer. Can the computer read these files? Backup as much as you can right now, then run chkdsk to look for bad sectors: http://forums.androidcentral.com/am...guide-using-chkdsk-fix-corrupted-sd-card.html.