You get 15GB of cloud storage space for free (which is actually shared across Google Photos, Gmail, and Google Drive), and paid plans start at $2 per month for 100GB of room. All the backing up runs more or less automatically, once you’ve got Google Photos set up on the devices where you take your photos and videos. Google Photos is tied into other Google services, such as Gmail and Google Drive, but perhaps not as tightly as you might expect. You can’t, for example, see your photos and videos in Google Drive—but if you’re adding a picture to an email in Gmail, you can access Google Photos with a click. You get the option to send the files to Google Drive, Google Photos, or both (which will of course use up double the cloud storage).