IPhone 7 keeps saying no more storage need to free up space? I've deleted almost everything keeps saying it

IPhone 7 keeps saying no more storage need to free up space? I've deleted almost everything keeps saying it

Id factory reset

In Settings, clean out what you can. The get the app Dr. Cleaner. Free, reliable (Trend Micro) and efficient. We have used this for almost 2 months and love it.