Is the disk bad?

Question

Hard disks

after it will be 100% easy to close?
How do I understand the disk is bad?
not even 101 error anymore
but 300

Answer 1

Either everything is bad with the disk, or (very unlikely, but you can try) there may be a broken cable.
Check with another cable, if the same - throw it away.

Answer 2

What are we talking about? There are already 300 bad sectors on the disk, the disk is dying. Pull information to another disk.

Answer 3

Do not close, the SMART tab is needed.
That's not a lot.