What is the iPhone “Other” capacity seen in iTunes?
It seems the iPhone “Other” section always takes up at least 200mb, which suggests it’s system files: the iPhone OS, database files, contacts information, settings, SMS data, core data, pre-installed apps, etc. The “Other” portion grows from there, so as you install more apps, add more contacts, send more text messages, and generally just create more data and caches for your phone to store, the system section grows just like any other operating system.
There are known flukes where the “Other” capacity starts taking up huge amounts of space, up to 8gb of this “Other” space has been reported. In this case it’s possible that the iPhone OS is misreporting files and categorizing something like a Movie as Other, this is most likely to happen after a failed sync. This is a good time to backup and sync your iPhone and then format/restore the device so that you’ll have a clean start.
The only known way to clear the “Other” iPhone/iPod Touch usage is to completely restore the iPhone through iTunes. Remember to sync and backup your iPhone otherwise you will lose your contacts, settings, music, and other data.
What if iTunes “Other” is taking up huge amounts of space?
You can fix the iTunes “Other” huge space issue by simply unchecking and re-checking “Open iTunes when this device is connected” from iTunes itself. If you’re confused, read our guide here. Thanks for the tip Mike!