I don't own a Beomaster 5 but I do know a few things about storage devices so maybe I can help.
If you are cloning the drive sector-by-sector there is no need to format it in advance, this is because the filesystem (which is what formatting creates) will be copied over too. There issues with cloning the drive this way, for example if the original drive was 500GB and the new one is 1TB, you may still be limited to 500TB usable space (because the original filesystem was only 500GB in size).
It is more likely that the cloner is unable (or refusing) to copy because the drives are of a different capacity. Other things that could be coming into play include block size (the HDD was almost certainly 512K, the SSD is probably 8K). Many older devices have problems with drives that report > 512K block size. The Beomaster could be such as device.