Thinking about getting an SSD to create a clone. Reading up on Youtube on SSDs, file formats, cloning, etc., believe I just heard someone way that to successfully create a clone, the new SSD should be formatted like the Mac HD that you are cloning which in my case would be APFS. Had to learn how to see what it was using disk utility. In the process, discovered that my WD My Passport hooked up to Time Machine is formatted OS extended (journaled). And apparently that is the only file format one can use for TM to work. Curious as to why a clone uses one thing and TM uses another, but most curious to know if the above is correct.