What is a drop box and how do I clear it
Drop Box is probably best explained by their front page: https://www.dropbox.com/
Essentially it is a storage drive that lives out on the Internet. You can save files to it just as you would a normal hard drive. However those files are then accessible from pretty much any device.
It can be controlled by downloading an Android or Windows app. Actually they have apps for almost every system (one of the reasons for their success).
Sign up through a link here, and add your own referral link if you wish.