Do you use folders or exercise books?

I was wondering what people use, especially at uni. For example, do you have a big folder for every module - or do you not get that many sheets of paper? Do you have most things on your computer? Or in exercise books?

I'm not at uni, I'm in sixth form - I use exercise books that I put into my folders for class work and homework and then just add sheets of papers into them for revision notes, and have one for every subject.