I know that this is a common problem, although I haven't found any real solutions to the problem. My friend had a problem like this on his Epic 4G and I heard about it on another Android phone, I believe the Samsung Moment. So I've been using my memory card for a while and haven't taken it out in about a month and a half. I've been adding stuff to it, taking stuff off, etc. and have been being very careful when disconnecting it as in disconnecting it from the computer via the My Computer "eject" button, or right clicking the icon in the right corner (on Windows 7 Home Premium) and safely disconnecting it. Today I download two different updates from two Glu Mobile apps, the BT Gangsta and Gun Bros. Where it asks you to download the updates to your SD card or your internal memory. I downloaded the update to my SD card on both of them and when they were done, it went to a black screen then force closed. I assumed that it was a problem with the apps, so I restarted the phone and turned it back on. When I did that, an icon appeared telling me that "Blank SD card SD card blank or has unsupported filesystem" I tried opening music and it wouldn't load neither would anything else off of my SD card and nothing will open. I tried taking out the SD card and putting it back in but it still gives me the error. My friend with the Epic simply formatted his SD card as the phone requested. I can't do that as I am rooted and need backups stored there and also have other important things on there. So I was wondering if anyone could help me. My computer doesn't have enough space to keep the files on the SD card so I can't back them up on the computer. The SD card is a 16GB and is FAT32 I believe.