Q: iphone 6 storage doesn't add up

Try performing a hard reset.

THIS WILL NOT DELETE ANY DATA

1. Press and hold the Sleep/Wake button (also known as the lock button).

2. Release the button once you see the Apple logo ().

I hope this helps.

Actually:

A reset is performed as Tap and hold the Home button and the On/Off buttons for approximately 15-20 seconds, until the Apple logo reappears. When the logo appears, release both buttons.

No content is affected by this procedure.

oops, forgot to add that step. My mistake.

iPhone 6  128GB  I have/had weird storage issues myself. (Not sure if it's fixed yet.) It started after I loaded 8.2.  I was only using around 60 GB then all of a sudden it popped up stating my Storage was full.  I checked my storage and I had 114 MB free.  I went into settings,then manage storage and the numbers didn't add up.  I then went into iTunes and I had approximately 65 GB of other. I couldn't even get a backup.  I freed up 2 GB by deleting whatever I could but it filled up before the backup would complete and then iTunes would error out about not having enough free space. iTunes thought it got a good backup once but it's corrupted and won't restore now.  It gets 90% done and errors with a message about how it's incompatible with my OS version.  Which was updated to 8.2 the same as when the backup was taken.

I did an OTA 8.2 update.  I usually don't do OTA's but for some stupid reason this time I did.  No, I didn;t take a backup before I did it and I've lost some things.  I'm not complaining about that, no backup is completely my fault. 

My irritation is the whole storage filling up.  One part being that I can't see what's going on with the storage besides the options available in settings.  Another iOS update and more problems.  What's happened to Apple?  I've never seen or had these problems with iOS updates before 8. Too much too fast?

Thank you for Apple for helping me clean out my phone and deleting those Apps I never use.

I Have the 128 gig and mine does the same thing when I plug my phone into the charger

I have the same exact problem on my iPhone 6 with 64GB.  She hardly have anything in it and maybe about 10GB use total, but now all of a sudden, the almost full message comes up...no solution using any cleanup Apps.  The total usage just does not add up.  Also recently upgraded to 8.4.  Virus?  iOS bug?  This is extremely frustrating.

I am having a similar problem on my iPhone 6, running iOS 8.4. It came and went with repeated efforts to sync (which didn't work at first, similar to other posts) then once it synced it cleaned up. Unfortunately now, the problem persists with < 100 MB available.

I read a post suggesting it has to do with Chrome/Safari browser info or bookmarks, but I don't have Chrome on my iPhone.

Think there is a glitch somewhere causing this, and looking forward to a fix.

IF YOU DON'T WANT TO READ THE LONG STORY, HERE IT IS IN A NUTSHELL: Get "iFunBox" (or some other file management app) and look for any hidden files on your iPhone. Then DELETE them!

I have been having a the same/similar problem since updating to ios8 (whenever it was when it first came out) to my 4s. I kept getting messages that the storage was full when i knew **** well that it wasn't! Also the phone would say one amount was free, iTunes would say another amount… nothing ever matched up. When looking under "manage storage" on the phone, just flipping back and forth from each app's info to "storage" would make the "available" amount go down (not a lot, but it kept filling up!). Music would show up in the "on my device/music" that i never loaded or downloaded from my library. When i deleted them they always came back but showed up as zero k. This always started when i turned the phone on to show all my music and turned on the iCloud library. The only thing that seemed to clear all this extra storage was to reset it and restore from back-up. Very time consuming and ineffective as within a few days it would start with the storage full messages again. The other day i read someone had used an app on the mac called "iFunBox" to find hidden files in their phone and delete them. i downloaded the app (free!) and found that i had hidden files too. A LOT OF HIDDEN FILES! In the phone under the "Raw File System" i found a folder named "Cloud Assets" that contained a little over 440mb of mp3 & m4a files, and accompanying plist files. I don't keep any music on the phone anymore, i stream everything from iCloud. It seems these were made from music i had recently listened to. The names were all altered. I copied them to my iMac so I could open & inspect what they were. Their names looked liked this:

CloudAssets/persistentid-4023831224729247364-HQ.mp3

CloudAssets/persistentid-4023831224729247726-LWHQ.plist

CloudAssets/persistentid-4023831224729249236-LWHQ.m4a

There was no way to play them from the phone, so i deleted them all and freed up a lot of space. BUT… as soon as i began streaming music again, a whole new batch showed up. Deleted them. Streamed. More files! This has been going on for the last 3 days. So big question is WHY DOES IT KEEP DOWNLOADING/GENERATING THESE FILES! (Apple??? What is going on here)

PS- i have just found a lot of weird cache files of iTunes artwork. Over a 1.5GB's worth of album and video artwork that i can find no logical reason for being on the phone (as their is no corresponding music or video on the phone either). Gonna delete them too!

- iPhone 4S iOS8.4.1 (but most of this took place with earlier versions) capacity: 5.34GB

I tried this and it was not very effective.  My usage still shows 11.8GB used and 209 MB available, Adding up the numbers in Setting>General>Usage>Manage Storage, I get only 3.89 GB used.  So, 4.2GB of system files (fine), but then 7.91 GB of data totally hidden from view and unable to manage.  Hard reset yielded about 80MB....

OK - here's something that helped me a little:

1 - I turned off iTunes match (it's called iCloud Music Library now), then turned it back on again. This yielded over 3 GB!

2 - I turned off Photo Stream and back on again, this yielded about 1.5gb (after photo stream re-imported about 1.1GB of photos).

So, those two "cloud" services are not really working as I expected they would. (and I am still missing about 4GB of storage space, but I expect a restore from backup might help.)

Apples - "Get the data off your phone and into the cloud!"

Me - "Awesome!"

Apples - "Just kidding, loads of data will be kept on your phone in a hidden partition that you can't delete.  You'll have to download it anew every time incurring data charges, but we won't be freeing up any actual local storage space.  Hope you love it!"

Me - "oh.... um.... ok.  Is this a glitch"

Apples - "Nope, no glitch here.  Did you see the new Apple TV!?!  It has games!"

I tried this and it did not appear to work. I did a manual backup in iTunes and was going to restore the phone. I gave it about 5 minutes and then checked storage one more time. The free space had adjusted and now matches what iTunes says is available. I just needed to wait a bit.

Thanks for this!

#SmartPhone

HHaving same issue with my 6S plus 64 GB. Frustrating!!!

Having same issue with my 6S plus 64 - ONLY solution was to delete the content and restore as a NEW device !!! now it is OK I regain 50 gb back !!! Will follow up to see if it gets worse again.....