I'm trying to 'recover' some space on my old HD. It is no longer used as a primary drive as discussed in another thread.
When I bring up Disk Management it shows there's 10GB in the 'Recovery' space.
The problem is when I click on it, the tools in the tool bar change and I can't seem to enlarge it or shrink it.
What has Windows done to 'protect' this from being used as normal storage space?
Pics show how the tool bar changes depending on what is chosen by the cursor.

I'd appreciate any help here.