Use the forum search feature. magnifying glass icon upper right, as there are a variety of “apps” that other users have created to run on the My Cloud including methods of replacing certain My Cloud OS versions with clean Debian. There are other discussions on alternate backup methods other than Rsync, Safepoint (first gen v4.x firmware) and Backup (second gen v2.x firmware). One such example is using Goodsync.
https://community.wd.com/t/app-goodsync-for-wd-my-cloud-backup-and-file-synchronization/173984
