I had similar issues trying to backup USB pen drives. Western Digital recommend ending the Smartware process usng Windows Task manger and re-starting Smartware from [Start] - [programs] - [Smartware]
This is a poor solution but will have to suffice until WD include a ‘refresh drives’ option in Smartware.
Your backed files will only be overwritten when you’ve exceed the number of versions you wish to keep - and only then if the original file has been modified. Regrading checking/verifying whether a file has been backed up - the date shown in [backup] - [detailed view] is no guarentee that your file is backed up. The only true way of knowing is to attempt to retrieve the file using [retrieve] - [alternative location].
I used to use this tedious method until I eventually lost patience with this poor software and uninstalled it and hid the VCD!