Save Space on Your IPhone by Changing Camera Settings in IOS 11
In iOS 11, Apple introduced the HEIF format for photos. HEIF stands for High Efficiency Image Format and lets you compress the photos you take with your phone to the smallest possible size without losing quality. This smaller size means you can take a lot more pictures before you run out of space on your iPhone (or the fact that you’re a Shutterbug won’t stop you from downloading the app).
There is only one problem with HEIF: most of the computer programs and hardware you use are configured to work with JPEG, not HEIF. The good news is that you can set your phone to save your images in HEIF format when on your phone, but export in JPEG format when you’re ready to share them with the world.
Here’s how to do it:
Configure HEIF
Go to your phone’s Settings menu, then Camera, then Formats and select High Efficiency as the format.
Customize JPEG export
Go to Preferences, then Photos as you did before, then select Transfer to Mac or PC and then Automatic. This ensures that your images will always be exported in a compatible format, most likely JPEG rather than HEIF, which may or may not be compatible with your device.