External HDD Files

Following a backup to another ExHDD, all file names are missing. Only file icon shows. Move cursor over icon and name appears. Move file and new location has same problem. My Computer show particular drive with only letter, not name, unless I move cursor....Backup was done with Drive XML, or Lacie. Been awhile, not sure. Would reformat resolve issue? There are only several files left, as many are deleted. Would like to fix the existing file first. Clues, please.