External Hard drive usually comes with a casing with USB 2.0 / USB 3.0 connectivity.
We need to be careful while using the External drive as the drive is carried from place to place and as a result, they get dropped, knocked, crushed, not safely ejected, overheated, accidentally format/deleted, affected by the virus,.etc which causes drive failure.
When the drive is not functioning properly we suggest not connecting the drive again and again as it may further damage your drive.