I think you misunderstood.
The file you want to backup, do you need to access them on a daily basis? Also is it just one user or many users that need to access the files?
This all makes a difference. If you backup files that do not need to be accesses often, this is very different to having off site files that are constantly being worked on. Not only the speed and convenience of accessing the files, but controlling version history of the files and accountability of changes. Also, in multi user situations, there needs to be access control.
Files worked on often also need a backup even if off site. What if Bob from accounting decides to delete a file or overwrite an important doc with his shopping list? Don't laugh it happens more often than you think.
The point being that files that need to be accessed all the time would need a different solution to files that just need to be archived.