Originally Posted by ThermalGuy

Some confusion of terms here. Understandable with the menu on the Droid.
Although the USB devices/drives are SUPPOSED to be PnP, if you don't "stop" it on the computer first, it can bork the card. There should be an icon in the system tray to "unmount" USB devices. Or you can find it in explorer. Find the drive letter assigned to the card when it is mounted, right click and choose "eject". It should give you a message saying it is safe to remove the device now. Some systems use "write behind caching" and if the card is still being written to, it will corrupt it.
Dana