iPhone storage not updating after deleting content
My iphone internal storage is full - I've been slowly working on it but it's gotten to a point where I'm kinda struggling. I deleted all my apps, even basic functionality apps like maps I've taken off my phone. I only kept Dropbox so I can move photos as needed. A majority of my photos are still taking up space on my phone and I know the videos take up a lot of space, I haven't been able to process everything and now I can't move photos onto my dropbox at all.
It's been a few days, I deleted a few videos, and I've been just straight uploading to Dropbox, then deleting a majority of the photos and videos and now I hit a road block. I've turned it off and on a few times, given it a day and the storage still isn't updating and I'm stuck in a limbo in the middle of trying to fix the problem myself. Advice? Also any advice to maximize storage during this time, like turning off icloud backup or something like that?