Get 21 free photo prints with this early Prime Day deal

Save $3.15: Get 21 free photo prints from Amazon by using the code PRINTS21 at checkout. When it comes to Prime Day, the main focus is usually on Amazon devices and other tech items. But if you look, there are also some really cool deals on some of Amazon's services, like its photo printing. As of June 16, you can get 21 free photo prints from Amazon Photo by using the code PRINTS21 at checkout. With this deal you can choose either glossy or matte prints in either 4 x 5.3-inch or 4 x 6-inch sizes, which are usually 15 cents each.  You probably have a massive number of photos just sitting in your phone's camera roll. When's the last time you actually printed any of them out? This deal gives you an excuse to get a bunch of physical photos to hang up around the house, put in a photo album, or make fun collages or crafts with. Read more...More about Photography, Prime Day, Mashable Shopping, Culture, and Work Life