My OSD shows 135Gig used, I cannot find more than 20Gig total

[Saltheart]

Ok I downloaded and ran WinDirStat. It says only 47 Gb used on OSD which is in the ballpark of what I think is about right. Thats about 90 Gb less than when I right click the drive and left click properties. On the other drive which should be almost empty , it shows only like 9 Gb.

Now this windirstat program agrees with what I think should be on these drives. Why does windows properties say each has almost 100 Gb more? Is all that extra space used up in the formatting? They are both 1 T drives. Do you lose 100 Gb formating these newer 1 T drives?

Very weird.