Here when I needed to clear that space I would turn off System Restore then turn it back on.
There's also some extra cleanup I can do in Disk Cleanup but not once do I do this manually in say File Explorer.
I have a HP ProDesk 400 G2 Mini desktop with a 2.5 GHz i5 processor 4GB Ram running Windows 7 Pro. I changed the original C drive to a 250GB SSD. Recently I noted there was only 15GB of free space on the drive. Using the TreeSize program I found that the System Volume Information folder was a large user of space. I went into System Protection and deleted all the old system restore points and now I have 28GB of free space. However, the folder is still showing 66GB of which I have reserved only 6GB for restore points. Is there anything else that can be deleted in this folder? By the way, the separate Windows folder takes up 44GB of space which I understand.
Another surprise was to find that One Note files take up 23GB of space. I have very limited information on One Note, about 5 or 6 tabs with a few names in each tab (I used to use Info Select where I kept various pieces of information). Is this level of disc usage normal?