Could not the content of your words been better spent answering the question.

> Could someone explain what's SAS and what's the difference between SAS and HDD?

This is like asking what's the difference between JavaScript and React. ish (some hand waving on the analogy)

The question you've asked can't really be answered? Idk what you're asking exactly.

SAS is comparable to SATA. Both can be used for HDDs. For individuals it doesn't really matter. For building huge-ass disk arrays, you might want to use SAS.

I was wondering if I would notice any difference in compatibility if cloning from a regular HDD. Thank you.