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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.

You need a document, photo or other file that you're sure was deleted. You've searched your hard drive. You've scoured the Recycle Bin. No sign of it? Don't panic. As long as you act quickly, you can ...