iPhone 11Pro Max: 382GB!! “Other” storage category

Keeping in mind that the “other” storage category is mostly filled with cache and system files created by Safari, the Mail app, other apps and iOS/iPadOS itself, that space is automatically managed by the operating system and you can’t interact with it.

That said, update your device to iOS/iPadOS 13.6.1 or later, as per this support article: Clear Other storage on your iPhone or iPad - Apple Support

If you already updated your device to 13.6.1 or later to no avail, some benefits to reduce that space can be also obtained creating a full backup of your device, then restoring it to factory settings and, in the end, setting it up as new, as per these instructions: Restore your iPhone, iPad, or iPod to factory settings – Apple Support

When done, restore data from your previously made backup, then restart your device and check your device storage again.

If the issue persists, contact Apple Support directly, using this link: Get Support

Regards

Giulio

You most likely have a corrupted file or files. Backup your iPhone to your computer but then restore your iPhone as a new device. See how much other you have then restore from your backup. If the 288GB of Other returns you are going to have to try and figure out which files are causing this.

Kathleen Corkett wrote:

The iPhone 11pro has the latest iOS 14... installed.

After a getting a new phone, completing a new reset and after installing the icloud backup...the extremely large ~300GB Other storage category is still there...?

This is an open case with Apple support, however, it’s been over a month with no follow up or communicated.

Side note: the picture upload icon doesn’t work in this new message window. ugh :-/

Sorry about that.

Did you use the procedure I suggested in my previous post to restore your iPhone to factory settings?

I'm asking, because that specific procedure automatically re-installs a fresh copy of iOS on your device.

Regards

Giulio

So you restored it as a new device and did NOT add any apps, photos or anything and it was still 288GB?