Clear unwanted clutter (need at least 6GB of free space to update iOS/iPadOS)

Clear unwanted clutter (need at least 6GB of free space to update iOS/iPadOS): Go to Settings ❯ General ❯ iPhone/iPad Storage ❯ see which apps are using the most. Make sure Photos is set to ‘Optimise iCloud Storage’ in Settings ❯ Apple ID ❯ iCloud ❯ Photos