I have an issue where I have a bunch of images on my iPhone but after deleting them, the storage still shows as 7 gigs being used. This is a bit worrying so I've been trying to figure out how to find out what those photos are.
Specifically, iPhone is saying that photos take up 7 gigs even after the images are deleted from the system and deleted from the recently deleted folder.
One possible solution:
Settings -> Date and Time -> Unset "Set Automatically" -> Change date to somewhere in the past -> Check the recently deleted folder.
The idea seems to be that the recently deleted folder may not actually be clearing properly, it is simply showing things deleted in the past little while. A strange bug.
[Sources]
https://www.quora.com/Why-is-my-iPhone-storage-still-full-after-deleting-photos