Same issue
Mine is iphone 7 with 32gb.
Since last week, I got an alert as same as you and I've tried every recommendation i could find on the web.
None of them worked.
Now i have 23.55GB of other storage.
Last weekend, before i tried to clear up this space, it was 19GB.
Now i am even considering to buy the new one and feel like this is a kind of dark intention by apple to make people buy new phone.
Kayla88
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
From
Ossining, NY, United States