File syncing service Dropbox is pushing hard for students to integrate their seamless backup into their school year—and we agree, it's a tech essential for college. To sweeten the deal, they're offering 500 MB per referral sent out from .edu addresses, plus retroactive credit once a collegiate-type address is verified. Might be a good excuse to grab an alumni.collegename.edu address from your alma mater. [Dropbox via #tips]

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