It is possible that there could be a file system problem. I know very little about the file system integrity checks done by Beyondwiz firmware, but I have a recollection that some rudimentary checks are made when the OS starts up. Reformatting the drive can fix such issues.
I assume that the dive is USB powered, as you prevously carried to court. There could be a problem with the USB cable. Is the drive attached to USB 2 or USB 3 port?
Ian
PS I suppose I should have posted this on the Beyonwiz forum - will cross post so no need to respond here.