Error: You need to format the disk in drive e: before you can use it.

Hello everyone. I'm having problems with my Asus EEEPC 900HA's USB drive and flash card reader. The problem first started last night after I installed a driver for my Android phone. After I installed the driver It kept asking me to format Drive E (in this case the SD card slot on my phone). I then tried using a Kingston 8GB Class 4 card as well as an MP3 player (Cowon D2) test out the problem. When I connect both they also give me the "You need to format disk" error. Both devices also appeared simply as Drive E (whereas before it would specify that it was a Kingston storage device or a Cowon D2). I tried uninstalling the phone drivers to see if that would do anything, but I'm still getting the same message. I also tried uninstalling the USB drivers and that didn't work either. I tried both on my desktop and both worked normally, so I know its not a problem with those devices. Any idea how to fix this problem?
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More about error format disk drive
  1. Somewhere along the lines something has mapped something wrong, perhaps in your Android installation has.

    Try plugging a external drive in and setting it as E drive..
  2. Tried plugging in my Western Digital 500GB external hard drive. It showed that a USB Mass Storage device was connected, but when I went to My Computer the drive hadn't shown up.
  3. Not to sure what to do.. But I know if two drives are mapped to the one letter you can bust a code in cmd and change the driver letter of one device to something unused.

    Or you can jump on another unit and make the drive letter something different and unused.
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