I have 4GB Sandisk usb. It was working fine till I connected it to tablet. While working, it got disconnected. When i connected it again, it was showing as damaged card. When I connected it PC, it was not showing in My Computer, however it was shown in device manager as portable drive on USB serial bus. When it opened Disk Management it was showing there but there was any disk allocated to it or in front of it. I tried using DISKPART from cmd, didn't work, it replies no media drive.