Others in iPhone storage
How to reduce others storage in iPhone storage
iPhone X, iOS 13
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That is usually a sign that something got corrupted in your system file. See:
Clear Other storage on your iPhone or iPad - Apple Support'
our the reply to:
How to Clear "Other" in your iPhone's Sto… - Apple Community
How do you get other storage space off my… - Apple Community
In general, you might need too backup your iPhone, reset the the iPhone to factory conditions, and then restore the iPhone from the backup.
How to back up your iPhone, iPad, and iPod touch - Apple Support
Restore your iPhone, iPad, or iPod to factory settings - Apple Support
Restore your iPhone, iPad, or iPod touch from a backup - Apple Support