100GB of system data I was trying to update my iPhone with iOS 14.1
I was told that I didn't have enough storage left, I was very surprised since I'm using about 10 of my 128 gigabytes available
After investigation, it appears that the 114GB is used for &quot;other system data&quot;, which seems absurd.
How to free up this space? (I guess most of it is irrelevant)
If possible, try deleting an app or two (optimally, one with some data stored on the iPhone) and see if this changes. If it goes up, this could be a &quot;known&quot; bug, in which case the only solution I'm aware of is, sadly, the nuclear option....  wipe the iPhone from Settings, and restore from backup (make sure to backup first!).