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Seems impossible to transfer data from Windows 10 140.7.1esr (32 bit) to W11 140.7.1esr (64 bit)

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  • Last reply by Matt

Larry Reese
Larry Reese

Hello all:

Transferring Thunderbird from the system above to the system noted above. Follow the instructions from here on the Mozilla Support page (copied both "Thunderbird" directories into the Roaming and Local destination directories. When the destination machine installation opens, it is functional (i.e. it picks up all the existing e-mail accounts, downloads new mail, etc...). The problem starts when we get to the local folders.

All of these have a date and time appended to them in the destination installation. For example, if the original folder is "Prosperity Bank" the destination folder is labeled "Prosperity Bank (2025_09_21 23_06_33 UTC)" and will not let not populate (shows no messages inside).

As I am typing this, it seems I may have identified the problem (or at least part of it). It seems the destination system install is slowly working its way through the local folders randomly (not in alphabetically order), as it seems to be slowly populating them with the old mail stored therein on the original system. It is going very slowly. Very slowly.

Has anyone else experienced this? Is it normal? Is there any way to quickly eliminate the dates now appended to the local file names? (Visually this is very annoying and I do not want to try modifying the individual folder names yet until I'm sure its populated as much as it will populate.)

Thank you for any assistance.

Larry Reese

Hello all: Transferring Thunderbird from the system above to the system noted above. Follow the instructions from here on the Mozilla Support page (copied both "Thunderbird" directories into the Roaming and Local destination directories. When the destination machine installation opens, it is functional (i.e. it picks up all the existing e-mail accounts, downloads new mail, etc...). The problem starts when we get to the local folders. All of these have a date and time appended to them in the destination installation. For example, if the original folder is "Prosperity Bank" the destination folder is labeled "Prosperity Bank (2025_09_21 23_06_33 UTC)" and will not let not populate (shows no messages inside). As I am typing this, it seems I may have identified the problem (or at least part of it). It seems the destination system install is slowly working its way through the local folders randomly (not in alphabetically order), as it seems to be slowly populating them with the old mail stored therein on the original system. It is going very slowly. Very slowly. Has anyone else experienced this? Is it normal? Is there any way to quickly eliminate the dates now appended to the local file names? (Visually this is very annoying and I do not want to try modifying the individual folder names yet until I'm sure its populated as much as it will populate.) Thank you for any assistance. Larry Reese

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Larry Reese
Larry Reese Question owner

Update - after some more time, it seems that about a quarter to half of the folders have not populated with any e-mails. Which I do not understand.

Also, the empty folders will not allow me to "delete" them using the command in the drop down menu.

Any help on correcting what I did wrong and getting the Thunderbird install working again would be appreciated. There were about 35 gig of files transferred from the old system to the new system in the Thunderbird "Roaming" directory. The files for the Thunderbird file in the "Local" directory were less than 1% that size. Might this large size of the replacement Roaming files have anything to do with the odd behavior?

Thanks again,

Larry Reese

Matt
Matt
  • Moderator
  • Top 10 Contributor

Those are two distinct Thunderbird versions per the profile per installation.

https://support.mozilla.org/en-US/kb/dedicated-profile-thunderbird-installation You will need to use the allow downgrade option to use your moved 32bit profile in a 64bit version.

Larry Reese
Larry Reese Question owner

Hello Matt:

I read up on the problem you identified, the 32 vs 64 bit installs. I think the best option for me (not highly skilled at command prompt usage to just install the 32 bit version on my destination computer - I would hate to screw something up). I looked everywhere I could for the 140.7.1esr 32-bit in English and could not find it. I found one on the Mozilla site and downloaded that but it was in some language I was completely unfamiliar with.

I found one .exe in in German on a mirror site in Germany but that was no help. Could you point me to an English version of the installer?

Thanks again,

LR

Matt
Matt
  • Moderator
  • Top 10 Contributor

That date and time makes me think the copy comes from some sort of backup. How did you create your copy of Thunderbird's profile to move.

Matt
Matt
  • Moderator
  • Top 10 Contributor

Pick your version and installer https://www.thunderbird.net/en-US/thunderbird/all/ don't just accept the default offering.

The commend line is not really all that important here as your command only needs to be used once and may not actually apply here as I think you have done something odd with the profile you are now using.to get those dates. They are just not right.

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