thumb drive repair?

The only solution to fix, is to format the drive but if your computer doesn't even recognize it, then you cannot even do that. Format will also erase all the data on the drive. Here are some possible issues that might be causing your problem: You used a Mac to put the data on the thumb drive. Since Mac and pc are not compatible so you will need to get the data off the drive with another mac. You added data to the drive using Windows Vista. Some people have reported compatibility problems with portable drives between Vista and XP. Try plugging the drive into a system with Vista. Last but not least, there is software that you can buy which will help you recover your data. Good luck.