500g Seagate External Hard

500g Seagate External Hard
drive is not showing in disk management or my computer but shows in device manager, I cannot do anything with it any action I try to do seems to freeze everything. This happened when renaming a file and everything crashed. After that it can't be picked up.

I have tried putting it in a different computer for it to update the drivers but it still hasn't worked.
I entered to the manage I found it but when I do right click there is no option jest properties .I tried to Cheng latter but does not work please help
thanks
 
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