Refer: https://programmingwithjim.wordpress.com/2017/02/22/enabling-rsync-to-the-wd-my-cloud/
ssh -oConnectTimeout=300 -oKexAlgorithms=+diffie-hellman-group1-sha1 sshd@192.168.0.11
root@WDMyCloud / # cd shares
root@WDMyCloud /shares # ls -ltr
lrwxrwxrwx 1 root root 22 Oct 2 12:33 mruckman -> /mnt/HD/HD_a2/mruckman
lrwxrwxrwx 1 root root 20 Oct 2 12:33 joseph -> /mnt/HD/HD_a2/joseph
lrwxrwxrwx 1 root root 20 Oct 2 12:33 family -> /mnt/HD/HD_a2/family
lrwxrwxrwx 1 root root 31 Oct 2 12:33 TimeMachineBackup -> /mnt/HD/HD_a2/TimeMachineBackup
lrwxrwxrwx 1 root root 23 Oct 2 12:33 SmartWare -> /mnt/HD/HD_a2/SmartWare
lrwxrwxrwx 1 root root 20 Oct 2 12:33 Public -> /mnt/HD/HD_a2/Public
lrwxrwxrwx 1 root root 13 Oct 2 12:42 Volume_1 -> /mnt/HD/HD_a2
lrwxrwxrwx 1 root root 16 Oct 2 12:42 BUP_Slim_BK-1 -> /mnt/USB/USB1_b1
Backup to SSD DRIVE
rsync -ahrv --progress "/mnt/HD/HD_a2/mruckman" "/mnt/USB/USB1_b1/mruckman"
rsync -ahrv --progress "/mnt/HD/HD_a2/joseph" "/mnt/USB/USB1_b1/joseph"
rsync -ahrv --progress "/mnt/HD/HD_a2/family" "/mnt/USB/USB1_b1/family"
rsync -ahrv --progress "/mnt/HD/HD_a2/Public" "/mnt/USB/USB1_b1/public"
TEST
rsync -ahrv --progress "/mnt/HD/HD_a2/Public/Fun Stuff" "/mnt/USB/USB1_b1/Fun Stuff"
NOTE: Using rSync will put "_un" folders on your source root folders