Impossible to format an external hard drive?

So, I am trying to format a 1 TB WD My Passport external hard drive but get the error messages.  I recently completely wiped out this player because he was running extremely slow and when I try to create a simple format through the disk management I get an error message "request cannot be performed because of an i/o error".  He also sees the drive, in disk management, but there is no associated letter and he said that all of the disk is not affected (931 GB).  How do I get this problem?

In cases where the Disk Manager does not work, I use a 3rd party application EaseUS Partition Master Home Edition (freeware @ easeus.com). It allows to create a partition in the unallocated space, and then name it and assign it a letter then put it. Then, Windows will recognize the newly formatted disk.

I don't know why Windows won't do, but I had this happens on two external drives, and it works.

Tags: Windows

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