File Program Data/Microsoft/Crypto/RSA/MachineKeys holds many many “Machine Keys”. WD backup fails to back up certain (but not all) of these keys (?) These are system files and scary to delete. (Warnings say Windows may stop working.) Any insights or advice. I can’t get a “clean” backup if I include this file, but I’d prefer not to leave it not backed up (?)
You can try to Manually Backup those files in the drive. You can refer to the link given below to know about the files not backed by WD Backup.
You can also contact WD Support team in order to find a resolution for the given issue from the links given below.
To Contact WD for Technical Support
The link below will allow you to call support.