Windows reinstall sanity check
So basically I want to free up space on my PC and reinstall windows aswell and swap boot drives. So I only have about 750GB of important data but have used up 3.2TB with application data and games spread across 3 main drives: 1TB M.2 SSD, 1 TB SATA SSD, 1 TB HDD. So I am thinking I will remove the important data from the M.2 Drive and put it on the SATA SSD after deleting some data and then I will install windows on the 1TB M.2. I will also externally backup the 750GB first on a 1TB hard drive. Then after windows has reinstalled I will delete unimportant data leaving me with the 750GB of important data + windows and the backup still intact. Doing this as I want a fresh install as haven't changed anything for 4 years. Does this all sound safe and good?