The default resolution is 3264x2448. But I never print photos - only use them in email attachments or posting online. Is there any reason to use a resolution higher than the minimum (640x480)? At the default setting, photos average about 8mb. I don't know how Google Photos' compression works, but a few dozen photos will lock up the phone for hours while uploading backups to the cloud. Wondering if that would be substantially alleviated by using a lower resolution. Any thoughts?