6 bad sectors is not a big deal.

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.

What does that mean?

I use Ubuntu + ZFS.

ZFS is cool because it has built in SMB and NFS file sharing, on top of RAID and data integrity features.

100 reallocated sectors is concerning. 100,000? The drive doesn’t even have that many spare sectors to use.

That’s not necessarily true. It all depends on the flash and controller used in the USB drive. There ARE USB drives that are specifically designed for high endurance.

I have a USB stick that’s literally using an SSD controller internally and SSD quality flash. It’s much more expensive than a normal USB drive.

I would also argue that (micro)SD cards have very poor write endurance due to a lack of an internal controller.

Price per gigabyte is what we should be looking at and not specific models of drives.

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