[iPhone 11 128GB, running iOS 13.6]

In Settings -> General -> iPhone Storage, On My Phone reports there is 1.16GB on my iPhone. However, if I tap into that section and review all the files there, I see at most 23MB worth of data when I add everything up. Restarting the phone doesn't change the numbers.

Is there some other place I should look to find these "large files?" Is there a known issue of reporting incorrect file sizes? Something else?

  • My iPhone says xx of yy Used. What are the xx and yy on your phone? – Natsfan Jul 23 '20 at 15:52
  • How many photos on your phone? – Natsfan Jul 23 '20 at 15:53
  • Could it be some files from iCloud Drive? To me it seems that all files, which don't have their app on the device won't show up, but consume space. – awado Jul 23 '20 at 18:16
  • @awado Unlikely - if I go into Apple ID -> iCloud -> Manage Storage -> iCloud Drive, that number is 418KB. My total iCloud Storage usage is ~2.7GB (which is mostly from Messages) – Conrad Jul 24 '20 at 13:54

These numbers do not add up on iOS 13.6 and lower in my experience. Apple has started patching the system to make these more accurate on iOS 13.6.1

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Be sure you check other storage in addition to the on my device portion after a clean power down and connect to power. I think the metadata collection and snapshot freeing run better when connected to power and that there is a gradual cleanup so the numbers are shifting daily in my experience for both my iPhone and iPad but they are aligning much better than before.

  • 1
    My On My Phone storage now reports 4KB under 13.6.1. Bug apparently fixed! – Conrad Aug 24 '20 at 18:17

Tested this on an unused iPhone. After factory resetting, this screen shows 671 MB used. I have not activated iCloud, TouchID or such. I guess this is system related user data, which is otherwise nowhere accessible. (Caches, fonts, location tracking and temporary data etc.)

  • If so, that sure is a lot of "temporary data" for no usage! – Conrad Jul 24 '20 at 17:27
  • OK I looked at this setting on my work iPhone (which I use very little other than Phone & Messages. On My Phone is only 4KB there! Very strange. – Conrad Jul 27 '20 at 13:54

Under the part that says xx of yy used is a color scale that shows you what makes up the used portion of memory. That should tell you what is using over a GB of data. It is probably your photos.

  • No, I am specifically talking about the On My Phone line item, which is distinct from Photos – Conrad Jul 24 '20 at 13:51

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