Hi Melvin, and welcome to Tom's Hardware,
Please be as specific as you can about your hardware setup including what Drive 0 is, how it is partitioned, & what OS you are using.
I am assumming Drive 1 is the Flash drive, but it should be recognized as the next available drive letter, like E or F, unless you assigned Drive letter Z to it. What is the size of the Flash drive, and does it have the file structure as FAT-32 or NTFS on it? Also does it have important data on it that is not replacable?
Many times the removable Flash drives become corrupted, for example when removing them before all cached data is saved, and the easiest solution is to just replace the Flash drive for $15-$25.
Might take a screen shot of your Computer Management screen, with the Flash drive plugged in, to be able to see both Drive 0, the Flash drive, and other installed hadware. That is always worth a thousand words. Can be done using ImageShack or Photobucket to upload the screen shot, and then post the URL in your response so we can see it.