So i have a 120gb SSD and it says its 111gb. Yes I know why but I have only used up 34.3gb in it but I checked the properties of it and it said I used of 46.9gb of space. Any idea why
Did Windows (7?) create a 2nd partition like it does with HDDs? Did you disable/shrink the system restore size? Drive indexing? Page file?
You may want to give this SSD performance guide a look through if you haven't already: http://www.computing.net/howtos/show/solid-state-drive-ssd-tweaks-for-windows-7/552.html
It will help you free up space and prevent the SSD from writing itself to an early death.