Did you know that when you make changes to a file you have in your Dropbox, the cloud service actually remembers those changes? In fact, Dropbox retains unlimited versions of your files for 30 days.

That means you can go back and recover a single deleted sentence from a text file, for example, but this feature also has the potential to radically change how you work. With a free Mac app called Revisions for Dropbox, you can really dig in and use this Dropbox feature properly.

Did you know that your Mac keeps older versions of the documents you work on, auto-saving them in the background so you can go back to a previous revision, any time you like? It’s just like Time Machine, Apple’s Mac backup feature, only it’s for individual files. It even lets you compare old and current versions of your file, side-by-side. It’s called file versioning, and it’s pretty rad.