I have a lot of ebooks on ADE and they're very important and expensive! (need them for my Actuarial exams)
If my laptop breaks - I'll lose them and be in a very difficult position.
Is it possible to back up the ebooks so in the event that my laptop did break - I could get the books back?
No, you should save the eBooks also on a external Hard disc. Digital Edition is no program to back up ebooks. Only a programm to display ebooks.