Micro SD card not usable on phone I installed a Micro SD card on my Samsung Galaxy 3 phone. I had a few dozen songs on the card and everything was working fine. Then I shut down my phone, removed the SD card, hooked it up to my PC and loaded the card up with a few hundred MP3 files. When I reinstalled the SD card on my Android, things went wacky. I can see the SD card icon but when I go to Settings &gt; Storage, the only option I see is the "Mount SD card" choice. When I click it, I get "SD card safe to remove".  

Bottom line is that the card seems unusable on my phone but works fine on my PC. Ideas?
I've had this problem numerous times and this is how I fix it.....

Take the SDcard and insert in card reader on PC. Use a partitioning program such as GParted, which is open source. Have it scan and fix errors on the card. Using just the PC to scan and fix errors wont work right for your problem. Put it back in your Samsung and enjoy.