After plugging in the device. Go to device manager(In run type "devmgmt.msc") In Device manager go to "Universal serial bus controllers" It would list the storage devices that you have connected to your PC. Right click and then click "Uninstall. Remove the USB drive and restart ur system. Try connecting the device again, it should reinstall the device drivers.
I think this may solve the problem if it's software related. Good Luck