Question Suddenly have more free disk space after restart.

[ggffee]

So what had happened is I store all my games in E drive which had 215GB of free space left. But after a restart, it went up to 217GB.
Now my anxiety kicked in wondering "What did i lose?".
Can someone help me ?

 

[USAFRet]

Temp files, pagefile, restore point....could be a lot of things.
1% drive space difference is not unusual.