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While trying to clear up space on my iPhone, I deleted all email accounts, as Mail was using well over 700Mb. I was expecting this to also clean up the excessive space being used by Mail, but it hasn't touched it - Mail is still using over 700Mb. I've powered off and back on again several times, and tried re-adding and removing the account multiple times, but Mail still uses loads of space.

Anyone have any ideas how to clean this up?

  • Very weird. Even with my email account linked, Mail and its data only takes up a meager 3.3 MB. – RedEagle2000 Sep 26 '15 at 21:55
  • Is it IMAP or POP? Did you empty the Trash? – Tetsujin Sep 27 '15 at 12:24
  • It was a google account. I can't get into the trash because I've deleted the account. Adding the account back shows an empty list until it can download the emails from the server. – citizenmatt Sep 27 '15 at 16:03
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It seems like I have answered a number of questions with this particular solution, but let's go for it again.

Often times a backup, wipe, restore process will clear out the cruft still sitting around in the rather opaque IOS filesystem. I don't know why but it works:

  1. Backup: Connect the iPhone to your computer and do a manual backup to that computer. Password protect the backup so you don't have to re-enter passwords.
  2. Wipe: Once you have a good backup go into the iPhone > Settings > General > reset > Erase all content and settings. And let it do its thing.
  3. Restore: Once the phone reboots and is waiting on it's welcome screen plug it back into your computer and restore it from the backup you just made.

9 times out of 10 all the inexplicable space usage on the phone goes away and you have got your space back.

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