There are a number of past discussions on the fact that the second generation v2.x single bay My Cloud User Manual has a number of errors in it including the Safepoint / Backup wording. The inability to backup from a single bay v2.x My Cloud to another v2.x My Cloud is another common complaint discussed in a number of prior discussions including one as recently as yesterday.
https://community.wd.com/t/mycloud-to-mycloud-backup-same-network/166589
As explained in that discussion there is a WD Support document covering the inability of the v2.x single bay My Cloud being used as a backup destination for another v2.x single bay My Cloud.
https://support.wdc.com/knowledgebase/answer.aspx?ID=13854
Unofficial workaround(s) to solve this inability may be to use SSH and Rsync to backup from one device to another. Do a subforum search for Rsync to find past discussions on using Rsync to copy files from one My Cloud device to another location.
