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iOS 17 Storage Space Bug / Issue

This feature/item was not there upon iOS 16.6 - but after the upgrade to iOS17 - phone storage data has been taken up due to SYNCED CONTENT.

There was no reason for it to take up nearly 20-30% of the storage away from the phone (when my device had about 30-40 gigs left I'm down to 4.23gbs). This has disallowed me to back up my device to my iMac due to now lack of storage space b/c of this issue.

This seems to be an un-tested feature/bug/issue. I'm sure many users would not be happy knowing that their device storage was depleted for some unwanted/untested feature.


Is anybody else noticing this issue as well (as among many reddit forums /alternative forums as well).


[Re-Titled by Moderator]

iPhone 12 Pro

Posted on Sep 21, 2023 10:16 AM

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Question marked as Top-ranking reply

Posted on Nov 30, 2023 4:28 PM

Who else has updated to 17.1.2 and still having issues or experiencing new issues? I may try to withhold.

153 replies

Sep 23, 2023 4:39 PM in response to STJ23

Have the exact same problem too. I have always manually synced my music library with my Mac, and since iOS 17 (and indeed, still on iOS 17.0.1), "Synced content" has appeared, and is the same size as my "Music" data, i.e. duplicated.

Phoned Apple support, escalated to tier 2, screenshots etc. and was ultimately advised that it's a known issue being investigated 🤷🏼‍♂️

Sep 25, 2023 12:54 PM in response to STJ23

The same .... except I followed the help desk advice .. and now my phone is essentially bricked.

64GB iPhone Xs.


Prior to Upgrade:

iOS ~9GB.

System Data ~1GB

Music ~ 14GB (Subset synced from Mac)

Free ~4GB


I was asked to free up another 6GB to complete the download which I did (Maps, Videos, Apps and Podcasts).


Post Upgrade:

Synced Content 10.8GB

iOS ~9GB.

System Data ~1GB

Music ~ 14GB (Subset synced from Mac)

Free ~0GB


Basically it had robbed me of 10GB of data.


I raised a call with Apple last Thursday. Was told to wait and he would call me back today with advice from Dev Team.

Advice was to do a fresh backup to my Mac ... totally erase the phone to factory settings, and restore from the backup. I was skeptical but I did it. (removed my music in order to be able to do the backup).

NO NOT IN ANY CIRUMSTANCES DO THIS.


Post Restore:

Phone is full

Synced Content now 24GB

iOS 10GB

System Data 8GB

iMessages has doubled in size.

Sep 25, 2023 2:37 PM in response to STJ23

My iPhone 14 Pro running iOS 16.6.1 was using 55.7GB of the 256GB available. When I went to buy my iPhone 15 Pro, I thought "oh I only need a 128GB 15 Pro" and just migrated. I got a warning that I was running low on space, and I was using 108GB of 128GB on the new 15 Pro. Apple's Podcasts was taking up 20GB so I was able to delete that and get down to 88GB used out of 128GB. What is also weird is the podcast app I use (Overcast) does not appear in the iPhone Storage screen on the old phone, and yet is the largest app at over 6GB. So I called Apple support and escalated to a supervisor who was able to screen share both phones simultaneously. He said there might be an issue with Apple's own apps reporting the wrong info, so he had me delete Apple Music and Apple Podcasts to see if that helped (I don't use either). It did not do anything. He then made me delete everything on the iPhone 15 Pro and reinstall from iCloud backup. After that, I was only using 75GB, but discovered my photos hadn't loaded. Once I started that sync, I could see my storage growing. I suspect it will end up in the 85-90GB range, as it had previously. I have now wasted 3 more hours on this whole upgrade saga, and will call Apple again after all of the photos/videos load (optimized) to try again. I worry the next step is to completely wipe the OS and start over. This might be the worst iPhone upgrade process of the 14 or 15 I've been through.

Sep 25, 2023 2:58 PM in response to JMB23

Hope u update the phone before moving everything over bc that's where they messed up. In addition I'd delete all downloaded podcasts and start fresh. In addition, its honestly anything that comes default w apple apps intergrated into the OS that reads as sync data. We're going to have to wait

Sep 26, 2023 5:35 AM in response to STJ23

Big big issue, a few days ago I cleared out some junk from photos and got my phone down to 60gb and again today I cleared down and when I go to check storage it’s up to 94gb… Almost all social media apps are 5-10gb all of a sudden. So frustrating I hope this issue is actually addressed.

Sep 26, 2023 6:03 AM in response to jczk

How often do you use social media? And when you use social media items- do they save photos/gifs/vids automatically? Those apps cache a lot of stuff. This post would have nothing to do with what's going on, but some advice, delete your social apps restart phone and reinstall. That should help, but that doesn't take away the fact it's going to recache some data - I'd also consider disable "auto save photos/vids/gifs" from those social apps, to help cut down on storage overload.

Sep 26, 2023 6:14 AM in response to STJ23

I promise you this post is related to my issue. There is no way my storage goes from 60gb to suddenly 94gb in 2 days right after updating to IOS 17. I have cleared cache on all apps already. Previous to this issue my discord was 500mb, now it’s 13gb… Never has it gone over 500mb and I don’t even use it often.


I am not going to uninstall and reinstall the apps since it’s all my apps that have tripled or quadrupled in size. I will wait till bug fix.

Sep 26, 2023 6:22 AM in response to jczk

Do you see your SYNC CONTENT going up? Please provide screenshot.

The sync content is related to apps already that come with the phone - that sync w/ the PC/MAC - ie - PHOTOS/MUSIC/PODCAST/NEWS/


Not 3rd party apps you install once you get your device.

So no - your issue isn't related to this post - HOWEVER - see what your apps do once you uninstall- and change the settings to not save the data files.

Sep 26, 2023 9:38 PM in response to STJ23

Similar issue, and it’s unfortunate how widespread it is. My issue on my 64gb iPhone 12, is how my apps take up hundreds of MB’s if not a GB or so of “documents and data”.

iOS 16 never had this issue so it’s sad to see this. I have maybe 20 apps downloaded. YouTube, Snap, Facebook, Instagram etc, all fill up on documents and data extremely quick.

Sep 27, 2023 3:09 AM in response to STJ23

+1. The update to version 17 'stole' 8 GB. Updating to 17.0.1 and performing iTunes backups returned around 4 GB. However, 4 GB are still 'missing.'


Today's update to 17.0.2 has worsened the situation, once again, with my 64 GB iPad Air 3rd Gen now almost completely full...


iPadOS 17.0.2: 9.48 GB

System Data: 9.44 GB


I find the System Data value, in particular, to be extremely high.

iOS 17 Storage Space Bug / Issue

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