Low space on my SSD

[holub.mates]

So i have an 150GB SSD and a 1 TB HHD and i make sure to sort stuff on my computer (deleting programs/games i dont use, ...) but i have only 50 GB free space.. The weird thing after checking my SSD I found out that the folders (program files, users, ...) take up only around 20-30 GBs. So I'm confused.. Could somebody please help/explain..
-Thanks

 

[USAFRet]

So i have an 150GB SSD and a 1 TB HHD and i make sure to sort stuff on my computer (deleting programs/games i dont use, ...) but i have only 50 GB free space.. The weird thing after checking my SSD I found out that the folders (program files, users, ...) take up only around 20-30 GBs. So I'm confused.. Could somebody please help/explain..
-Thanks

Install and run WinDirStat
Run As Administrator, selecting only this drive.

Post a screencap here.