Thanks for your reply but this got fixed today though I'm not sure what did the trick. This started when I put in the CD-RW disc used for backing up Quicken data files. Did this insertion 2X, drive ran on and I could not get a file list. Today I was able to format a DVD-RW disc, was able to write and read an excel file but could not backup the Quicken file. Just for the heck of it I removed the DVD-RW disc, inserted the problem CD-RW disc and it was suddenly back in operation. A list of previously backed up files appeared and I was able to do a successful file backup. Go figure! Leaves me a little concerned should restoring the backup be necessary.