Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

My inbox file is 459 mb. Since the 20th of may windows shows Error 0x80070570 on the file. Can it be saved?

  • 3 tontu
  • 1 am na jafe-jafe bii
  • 1 view
  • i mujjee tontu mooy Toad-Hall

more options

My inbox has always been in the same folder, and everything has always worked perfectly. Suddenly my inbox was empty. No e-mails shown. I then reinstalled Thunderbird (ver. 52.8.0). Still empty inbox. I'll just copy the old inbox file to the new installation, I thought. But no... Error 0x80070570

My inbox has always been in the same folder, and everything has always worked perfectly. Suddenly my inbox was empty. No e-mails shown. I then reinstalled Thunderbird (ver. 52.8.0). Still empty inbox. I'll just copy the old inbox file to the new installation, I thought. But no... Error 0x80070570

All Replies (3)

more options

Could it be you have Thunderbird running when you try and replace a file it is using?

more options

Hi Matt

Thunderbird was closed. In Windows Explorer I simply tried to copy the Inbox file from the external backup location to Thunderbird.

It all began in late May with Thunderbird simply not opening. I tried all sort of things, and ended up reinstalling Thunderbird. In the new installation I see (the old) sent, draft, and archive folders. Only Inbox folder is empty, starting from scratch.

With Thunderbird closed I can copy the Inbox file in explorer, but when I try to paste the Inbox file to the Thunderbird folder, the process stops at 31%, with an error message: Error 0x80070570, with a date stamp shoving 20.05.2018 at 20:53.

Something has happened to the Inbox file the 20 May it seems, since pasting the file stops at 31%, and this unfortunately means no mails are shown.

The question is if the Inbox file can be saved? The inbox file is 459 MB. Could the error be contained somehow, leaving the remaining unspoiled part of the Inbox file still working?

more options

Read info:

Suggest you make copies of Inbox mbox file. then subdivide a copy calling each new half eg: 'Oldbox-1' and 'Oldbox-2'

If adding manully to profile folders make sure Thunderbird is closed first. Otherwise use 'ImportExportTools' addon extension to import the mbox files.

Hopefully one half will import ok. Keep subdividing and importing until you discover a smaller batch to check.

Note as you are manully subdividing this is an example of how each email begins:

  • From - Fri Jun 19 16:49:56 2015
  • X-Account-Key: account1
  • X-UIDL: AKdUfbwAAFXTVYQQNgVLeCXC0EY
  • X-Mozilla-Status: 0001
  • X-Mozilla-Status2: 00000000


Alternative would be to use use a program that could use a copy of the 'Inbox' mbox file to extract each individual email as an *.eml file. Then import the *eml files. ImportExportTools can import .eml files.


Suggest you keep your files much smaller and use the Inbox as an Inbox and not as a general storage.