Cleaning up storage?

In retrospect, I would do one drive at a time, and I would have put them in on a Friday night, so they would be finished when I came in on Monday. Note for anyone else who attempts this.

I thought it would migrate both drives at the same time.

I am a little worried about any sort of 3rd party disk management tool while the hard drives are migrating data. My C drive is down to ZERO free space, and I’m continually getting warning messages. The migration is still happening, albeit slowly. I guess as long as the migration is happening, I will let it continue. Once it completes, I’ll look into making more space.

I just saw this post - How to increase hard drive c:\

It looks like 75 GB is the recommended size for the C drive. If I can move the partitions around afterwards with a 3rd party software, I think I’ll allocate 100 GB to be on the safe side.