This is all assuming it's a spinning disk and not an SSD, so ignore me if that's the case:
Given SAS drives are usually used in data centre storage array applications and 3TB disks have been kinda small for that use case for a fair while, there's a fairly high chance it was in heavy use for a good number of years. I'd bet it's probably well on its way to being a paperweight regardless of your connectivity situation.
If you do get it hooked up, don't store anything on it you wouldn't be okay losing.
Wanted a scratch disk to aggregate all my sensitive information thats scattered and duplicated on smaller disks and thumb drives. Would probably keep it as an ultimate backup too (I got a real backup).
My thinking was that usually those disks are swapped out after 5 years when failure rates starts to creep up, but there's still is some life left, largely enough for some fun.