Here is the reply I received from Technical Support: “It is possible that the files were in use by an application or the external drive disconnected at the time the software was gathering the files to perform the backup.”
Concerning the files being in use, I can understand that. Concerning the external drive being disconnected, that makes no sense.
Nevertheless, based on the fact that this situation, as I reported earlier, does seem to self-clear after a few days, and based on the fact that I have successfully performed some test restores of specific files, I tend to believe the answer TS provided to me. Yes, I can understand that perhaps the WD Smartware occasionally gets delayed in its ability to back up a file immediately.
Since I have had no other issues at all with the Smartware or the drive functionality, I might just choose to use my option for the free 30-days technical support by phone just to nail this thing down more precisely. If so, I will post my results here too.
