How to make incremental, differential backups from NAS to external USB

The missing scheduled USB back is a common complaint with the v2.x firmware going back years. Few examples in the Cloud Ideas subforum.

https://community.wd.com/t/multiple-source-folder-select-for-usb-nas-nas-usb-backup-schedule-queue-backups/96992

https://community.wd.com/t/schedule-queue-usb-backups/96993

https://community.wd.com/t/request-for-scheduled-usb-backups-from-nas-to-usb/150539

The first generation v4.x single bay My Cloud does offer scheduled backups (called Safepoints) in the My Cloud Dashboard. For what ever reason WD decided not to include a scheduler in the newer v2.x firmware for various My Cloud models. This of course has forced (we) the end users to find workarounds which sometimes involves using computer based backup software to accomplish what should be a standard feature with My Cloud firmware.

The main problem with using software on a PC to backup to a USB drive attached to the My Cloud is data may end up flowing from the My Cloud through the computer then back to the My Cloud then to the USB drive attached to the My Cloud. Resulting in a very slow backup.

While I used to use Safepoint to backup my first gen single bay My Cloud, I’ve found it sometimes failed to backup properly. That’s why I switched to using Rsync. More control over how and what I backup. Yes it takes a little bit of Linux knowledge and SSH knowledge to setup and enable Rsync backups, but the end result is the backup goes from the My Cloud to the USB drive without going onto the network. Even though the USB port on the single bay My Cloud is a bit slow its better than sending the data across the network then back. But as always YMMV.