Question Internal storage drive problem

Dec 22, 2020
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This is my first visit to Tom’s Hardware and first post. I am 90 years old and my brain no longer works like it should. Can’t remember names of things.

I have a Dell Optiplex 9020 with an SSD 500GB drive. The drive has been set up with two equal partitions, one for Windows10 and one for Windows7. I installed a 6TB internal hard drive that is now slightly over half full. My problem is that it is only accessible on Win10 and not on Win7. At the present time I am using a 6TB external drive for my data from Win7, but I would much prefer to use the internal hard drive for both operating systems. Is this possible, and if so how do I go about doing this?
 
This is my first visit to Tom’s Hardware and first post. I am 90 years old and my brain no longer works like it should. Can’t remember names of things.

I have a Dell Optiplex 9020 with an SSD 500GB drive. The drive has been set up with two equal partitions, one for Windows10 and one for Windows7. I installed a 6TB internal hard drive that is now slightly over half full. My problem is that it is only accessible on Win10 and not on Win7. At the present time I am using a 6TB external drive for my data from Win7, but I would much prefer to use the internal hard drive for both operating systems. Is this possible, and if so how do I go about doing this?
When you say "only accessible on Win10 and not on Win7" what do you mean, can't access it from File explorer ?
In W7 go to Run and type "diskmgmt.msc" and see if disk is there and if it has a letter assigned to it. If not assign a letter to it, any letter not assigned to a drive partition yet.
 

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