I/O error usually means the drive has failed and can no longer be used (except as a door stop - lol).
In some cases however, only the PCB inside the enclosure has failed, and in that case you can extract the actual drive and buy a third-party enclosure for it. If the drive still doesn't work, then the drive itself has failed. There is no fix for that other than buying a new one.
It is not wise to post your email address where anyone can see it. All you are doing is inviting more junk mail to your inbox. We do not send replies to email addresses anyway. If we did there would be no point in having a forum.
We reply only on the forum so that others may benefit from them.