memory stick not recognised

[craigy2567]

my memory stick is now showing on all computers that it needs to be formatted, before it was ok and used regularly.

 

[Phillip Corcoran]

It's memory chips are corrupted so it's now useless as that can't be fixed.
Bin it & buy a new one (a decent brand is advisable).

 

[Jatheon]

If you have some files on it, and you need them try to recover them with this software, and unfortunately you must buy new one. http://www.cgsecurity.org/wiki/TestDisk