IOS 15.4 After Install Increased Storage Iphone

totally agree. my system data is at 10GB. I have decided to drop this **** iphone and go to android.

it's been two months and no solution so I'm saying "F this".

I have tried multiple fixes and nothing.

taking my business elsewhere.

All right, so here’s my solution. I figured that the main problem came from the Notes app. For some reason the notes app was filling up the entire storage of my phone. I didn’t have that many notes. So I had no idea why it would take up so much space. Anyway, long story short, I figured out where notes are stored on my MacBook and use the grant perspective (a storage inspection tool) to figure out which note attachment is taking up a lot of space. What is still inexplicable to me is that there were entire apps stored as attachments. Like the macOS Monterey installation, which takes up 12 GB of storage. This is really strange, because I don’t have any such attachments. What I did then was to store all my iCloud notes on my Mac, then disable iCloud sync for notes on all my devices, removed and reinstalled notes on my idevices, restarted my Mac, and finally turn sync on again and move my notes back to the iCloud folder. Now storage is under control again.

So, for me it all had to do with Notes. This might me different from everyone else. I informed Apple for what it’s worth. Good luck.

How did you figure out that it was the Notes app clogging up the system data on the iPhone, like you say in the beginning? Would be interesting to know.

I've noticed that sometimes the system data goes down after very long times and without any special frequency. Sometimes after a hard reset or an update but I've never managed to find any repeatability as sometimes it goes down at once but many other times it can take days or nothing happens.

One other question: How long have checked after you put on the sync again to iCloud, and put back notes again, to see if the system data really stays low?

I ask as I've noticed that it can take many days or weeks before it starts to clog up again.

Absolutely the same problem with this update. System Data is taking up 36GB! Now my storage is full to the brim.

same here! system data is at 12GB now, what the **** is this!!!!! it's been more than 72 hours

Exactly what happened to me as well! Ridiculous this Apple! Fix it!

Didn't Apple even say in the update just before this that you had fix it?! What's happening. My phone is all clogged up due to this

Me too!!! I left 6GB out of 64GB.

What is this Apple? Are you going to fix this?