You would copy such or rather sync then turn off the sync. But then how to access it like a drive? Dropbox may not be what you need.
Maybe a few USB memory sticks is the best move.
Bob
Hi.
In a MAC. How I can upload photos to Icloud?
How to copy photos from Itunes to Dropbox?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic