There are several ways to export your Snapchat memories to Google photos. Whether you're using iOS or Android, when you first select the option to export a snap, your phone will give you an option where you'd like to send it to. You can select the Google Photos icon and send it directly through. If you don't see the Google Photos icon, save the memories to your device but select the option to save them to a specific folder within your phone's Gallery. This will make it easier to backup your photos to Google Photos. Simply select the Snapchat album and upload it to Google Photos.