Finally got CloneZilla to work at cloning to a new larger drive. In my case I wound up having to put the existing My Cloud drive and the new one in USB to SATA enclosures then perform the clone. For some reason if I used my PC’s SATA ports CloneZilla would throw errors.
Yeah that’s right. That is not a typo. 22 TB’s of free space.
The My Cloud has an internal 12 TB drive and a second 12 TB drive attached via USB. These two drives will be going into a better NAS enclosure hopefully soon if Synology enclosures go on sale during Black Friday/Cyber Monday.