A photo backup (known as camera upload) and photo viewer by Dropbox
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Pro Easy to use
You can use Dropbox via website, by installing a desktop client that creates a folder that you simply drag and drop files into, or with their mobile app. Everything synchronizes across all devices used and cloud storage. And Dropbox offers easy methods of sharing whatever is within it.
Pro Up to 18GB of free storage space
Dropbox personal accounts start out free, with 2GB of space, but users can get extra space by recommending the site to friends, or taking part in events like "Dropquest", where users can win extra space by solving puzzles.
Con Carousel app shut down
On March 31, 2016 Carousel was shut down as a standalone app, and returned to a single Dropbox photo experience. All photos are safe in Dropbox, but the Carousel app for iOS and Android stopped functioning.
Con Not a lot of free space
While it's possible to get up to 18GB of free space by jumping through a few hoops, the basic plan starts at just 2GB of free storage.