Solved Disk Analyser doesn't add up

[JDY]

I looking to buy and install and SSD for my pc and need to shrink down my C: drive to clone. My C drive says it using 169GB but when i open up disk analyser program it only really adds up to about 70GB. If i look at the folders in my C drive it too only really adds up to about 70GB so where is all this other data? I want to buy a 60GB ssd drive and I have about 40GB worth of my own files which i can move but that still wont reduce the C; drive to around 60GB.

Any help would be appreciated.

Cheers

 

[JDY]

Downloaded tree size and found about 100GB worth of system restore files. Turned it off so they all get deleted and I'm gonna reduce the size it can use to about 1% of my 1TB HDD.