Posted 12 November 2012 - 09:27 PM
Do you mean a USB Drive, like a flash drive? Does this happen with any other flash drive you use?
If you are able to access your data, do so and back it up on your computer. Your flash drive may be getting close to becoming corrupted and you will lose anything on it. After backing up your data in a safe place, then proceed to wipe the flash drive clean by formatting it (Remember formatting a flash drive will result in deletion of the data on it, which is why it's important to make a back up copy).
It is also important to remember that a flash drive shouldn't be used as a working disk, i.e. a disk that you work from, save to. It is a portable storage device, you copy files onto it and take it to another pc and copy files off, they don't have the read/write speed for working off of. Having said that, it is good to format a flash drive often to keep it working at it's best (remembering to have a back up copy of important files). To avoid any corrupt data issue follow these guidelines.