If you are on Android there are sync programs and can connect to a shared folder on your computer.

You can also try to get a USB drive that can plug directly into your phone.

Not necessarily. If it sounds like it’s “grinding”, that’s bad, or “clicking”, like “tik tik tik tik” and the computer pauses for a second, that’s bad.

SAS is used in enterprise hardware. Consumer hardware won’t have SAS connections without an add-on card.

You’re better off getting a SATA drive.

Amazon sales and prime day and Black Friday are all totally bogus except for a few specific loss leader deals. Everything else is on sale based on marked up prices

I have some disk images that need to be bit perfect. I store them on a ZFS RAID AND I made PAR files for additional redundancy, and I keep two copies on two different computers.