Backup Synology NAS to WD Cloud EX2 Ultra

A possible answer is found, using the site search feature, in the correct subforum (OS5 WD My Cloud EX Series) for your My Cloud device:

Once rsync is configured on the My Cloud EX2 Ultra one could try to use the Synology Hyperbackup Rsync option to try and sync or copy from the Synology to the My Cloud.

Other discussions on copying from Synology to a My Cloud: