|It sounds like you have a poor connection.|
This flash drive may not get a good connection in the front ports on a desktop case, or if it's plugged into a port in a hub ,
See response 3 in this:
or if the port is physically damaged and the drive's plug is loose in the port, or if you're using a USB extension cord and the cord is damaged or it's plug is loose in a port or the flash drive is loose in the female port on the cord.
It should work fine in any ports directly connected to the mboard, if they are not physically damaged - the ports on the back of a desktop computer in the I/O area where most of the ports are, or the ports built into a laptop case.