I think just about any NAS solution needs to have backup versioning / snapshots. I’m surprised that the My Cloud product doesn’t bundle any sort of differential backup versioning. Having a single backup version on an external drive is not sufficient.
A simple solution would be to use rdiff-backup to push daily increments to any other rdiff-backup target (rsync via SSH, CIFS share, etc.) Does anyone know how to install rdiff-backup on this device? Most of the dependencies are missing (libc6 and about a dozen others) so I cannot simply install the Debian .deb file.
I think WD needs to implement rdiff-backup in their firmware and create a simple web interface to view point-in-time versions of a share/folder and restore them.