External USB dvd drive not being recognized

I bought an external DVD drive to use with the Surface Pro. Sometimes the Surface recognizes the drive under My Computer, sometimes it doesn't. It never will recognize there is a dvd in the drive. Is it possible there is a file that is corrupt on the Surface?

TIA

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0