Yes I know about the guide, it doesn't work: Time Machine protects the Time Machine volume in a weird way and it prevents you from doing normal things with it. Of course it can be solved with sudo terminal trickery but it's annoying.I'm not understanding the problem with Time Machine. It makes you format the drive to copy FROM it? That doesn't seem right. Apple has a guide for transferring the backup to a different drive and it seems fairly straight forward. Maybe you should follow it. https://support.apple.com/en-us/HT202380