iPhone SE – Average Photo Size

Unfortunately, as I looked through Settings, as I thought, I couldn't find a way to change a settings like that. To be honest, I'm surprised that you had the option to remember the setting, as I have never had that (and still can't duplicate that).

I would recommend rebooting the phone to see if that, for some reason, fixes the problem. Also, as I'm sure you are well aware of, it should be mentioned that when you Message (MMS/iMessage) a picture or video it won't ask you the size, and when you email a video, it won't ask you the size.

If you really wanted to, you could reset the phone's settings (Settings > General > Reset (at the bottom of the list) > Reset All Settings). Honestly, I've only done the wipe all content and settings, so I'm not exactly sure what all it will reset, but it should take care of that problem. Don't forget to back up just in case.

apparently the "recently deleted"-feature in iOS8 is broken. Photos you've deleted don't disappear after 30 days, they're just hidden on your device. The storage being used isn't "phantom usage", since the photos are still safely stored. The easiest short term solution is to set back your date on the phone month by month (until the release of iOS8), and your deleted photos will reappear in the "recently deleted"-folder. There you can manually and permanently delete them.

As long you regularly delete all "recently deleted" images, your storage won't clog up.

If you want to get an overview of the photos on your iphone just download iexplorer. There you'll see all of them, even those you can't see on your iphone.

Here's a blog post about the issue: https://blog.tmoehle.de/ios-photo-problem/

Cheers,