My second hard drive (135GB0 has ran out of space, The thing is there is only about 20GB of stuff in that drive. I have got rid of all the back ups except the most recent which is around 35GB. Whats taking up all my space?
Probably a hibernation file, pagefile, or update uninstallers. Windirstat can show you large files. Once you disable hibernation, you can delete the hyberfil.sys file. You can set your page file for a fixed size instead of "let windows manage". In your windows folder you will see a bunch of $NTUninstallKBxxxx. If you don't plan on uninstalling any updates, it's safe to remove these.