If you insert your thumb drive and nothing happens, follow these steps to try and correct the problem:
* Go to Start and right-click My Computer (or Computer) and select Manage. Under Disk Management, locate your thumb drive, right click and choose change drive letter. If it already has a drive letter, try assigning it a different one, as it could be trying to use a drive letter that’s already assigned to another device.
* If that doesn’t work, try rebooting the computer with the thumb drive still inserted in the USB port and see if that helps.
* Try other USB ports, or try unplugging other USB devices that might be interfering with it.
* Under Disk Management again, confirm the thumb drive is partitioned and formatted. If not, right-click the drive and proceed to format it. Note: all data will be erased from the drive.
To prevent accidental damage of your thumb drive, be sure to remove it correctly from your computer after each use. If an external drive is connected to your computer, you should see a Safely Remove Hardware icon in the system try by your clock. Before removing a USB thumb drive, click that icon and find your drive in the list and choose “remove.” It will display a message stating when the device has been stopped. You can also open My Computer and right-click the drive and then select “Eject.”
Thumb drives are fragile and quite unreliable. It may be possible it has completely failed. Be sure to use thumb drives only as temporary storage and also try and keep backups of any data you store on removable drives.