Old WD HDD 2006 on Windows 10 - discoverable but cannot access files

hi, I have a pretty old WD 250Gb HD and a couple of years ago I gave up on it as I could not see it at all on my laptop nor PC.
I have recently upgraded to a new PC with Windows 10 and thought although a long shot, i would give it a try.
the WD is visible in the Device Manager so I tried to update the device driver (done) and health check suggest the device is working fine. Yet, I cannot see it in the files explorer at all and hence cannot access content.
I did try both USB 3.0 and 2.0 with same results.
I read I could try to map it by assigning a harddrive letter but I do not know how to go about it.

any advice appreciated.



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