If you have a large volume of material to shred there are shredding services. A local bank, Security Federal and a credit union sponsor shred days where they have a local shredding company park at one of their facilities. Customers drive up and drop off their documents.
The truck has a power take off setup that drives a monster shredder, it doesn't even slow down as bank boxes full of paper are dropped in, it was rather satisfying to watch. CDROMS and binders, no problem, and it is through enough for use on a government facility for all but super duper secret squirrel stuff.