I have an iPhone 5c with 8GB of storage, out of which approximately 3GB is taken by the operating system.
I've always had issues with running out of space, notwithstanding the very few things I keep stored on it, but since some days I'm having the whole memory completely taken and I'm unable to take any picture.
I keep on deleting files (e.g. I delete media from WhatsApp/Messages and I move pictures from the iPhone to iCloud), but still the memory is never released and always stated as 100% taken, and I'm talking about a significant amount of files deleted/moved (approx. 200 photos and 10 videos).
I hence try to restart the device, close the applications (trying more generally to make the OS re-initializing the memory stats), but still no luck. The only (weird) thing that makes the memory release a bit is when changing the language.
My operating system is iOS 9.0.
I'm wondering what's going on, are the deleted/moved files cached somewhere? Is there any effective way to completely release their memory cells and get back my memory?