What are all these folders that are spawning in my web folder?

They have the same name as my RW file and have subfolders /Pages and /Resources. I cannot imagine that it has anything to do with Autosave and Versions because in RW6 I had this feature switched OFF – but they just kept on proliferating and I had to clear them out from time to time because my boot disk was getting tight on free space. It is happening just the same with RW7. It is eating up my hard drive and if they are not serving a purpose I need it to stop. (Actually I thought I would try switching Versions and Autosave ON under RW7 - is this related at all???)