Make sure that any files you may have been accessing from the USB drive are closed, and try again. If the problem keeps occurring, go ahead and pull the USB drive out: as long as it doesn't have any files open when it is removed from the computer, it will be fine.
|Monday - Thursday||8 a.m. - 8 p.m.|
|Friday||8 a.m. - 6 p.m.|
|Saturday - Sunday||10 a.m. - 4 p.m.|