True Image Backups Failing Part Way Through Backing Up

My Cloud Home (MCH) should not be your only source of backup. In your case, using a USB HDD directly to your PC or choosing a different NAS may be better choices. MCH is a product for the home and it is going to have problems with updating many thousands of small files or copying files larger than 4 GB and despite what support may have suggested, there may still be bugs with >4 GB file size with the WD Discovery software and the proprietary KDDFS files system that it mounts. See this thread and its following possible solutions: