To scan your phone for old and unused items to remove, like downloads and unused apps:
Touch Clean.
You’ll see suggestions for categories of items to check and free up space.
If you don't see suggestions to free up space, check that suggestions are on:
To free up space:
Do any of the following:
If you automatically back up your photos and videos, you can automatically remove copies from your phone's internal storage after 30, 60, or 90 days.