Just bought two 4TB My Book externals - Device Manager recognizes, cannot open

Hello

Newbie here. Long time WD users as I have four drives running now. two of them being 2TB, so I updated for space reasons and bought two 4TB drives to replace them. I plugged in both of my new drives and the computer recognizes them in the Device Manager, but neither of them will show up in My Computer allowing me to access them.

I thought it might have been the USB cord or some compatibility issue, but the Device Manager found both of them.

Ideas?

Did you try just plugging them one at a time and see if they show that way? What OS are you using?
Joe

Windows 7

I used them one at a time. When first one didn’t work I tried second one with same result. Cannot be a coincidence. Figured something simple I was overlooking.

Also tried different USB ports too.