113.5TB. 41%.

I wouldn't mind doing it manually once in a while since it is a pretty straight forward process, just time consuming to do. Big file + MD5 check. Move big file to SSD + do another MD5 check. Should match if all is well.

I have some more advanced methods I can use too with some of the tools I have here. Write LBA number pattern into every LBA and then read it back to see if everything is perfectly correct. I'll probably just do MD5 though.