Seems impossible to transfer data from Windows 10 140.7.1esr (32 bit) to W11 140.7.1esr (64 bit)
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
All Replies (4)
Don't know why the A, B, C, and D section was converted to a slider instead of a paragraph. Trying again below.
A. Under the Lawfirm (blue bold text) e-mail address, there are 3 dated directories in "Archives" which are not in the old machine. For example: 2021 (2025_11_22_23_06_20 UTC). When these are clicked on an Error message appears - "Unable to open the summary file for (the named folder). Perhaps there was an error on the disk, or the full path is too long."
B. Below the Reeselawfirm Trash folder (not in it) there are ~100+ archive, drafts, junk, sent, spam, templates, and trash folders, each with a date/time as part of the folder name. For example: Archive (2025_12_17_17_40_02 UTC) . These all give the same error message as in A above.
C. Then, where that long list of folders ends, a similar list of folders one step up the directory tree appears. This one consisting of 1 Archives folder, 1 Drafts, ~36 INBOX, and one Templates folders. For example: Archives (2020_01_12_23_17_29 UTC). All these give error messages as above in A if clicked on.
D. After that, the second e-mail address section appears. There is nothing wrong with this one in any way that I can see. Below that, is the Local Folders section. See section 5 below.
Actually guys, I figured it out myself. Deleted the (date files) and (date files.msf) manually and cleaned up the entire Local Folders directory and "live" or current e-mail directories as well.
All is working and looking identical now.
Thanks again all! I appreciate you sticking with it.
Larry Reese
Just for the record (if someone else finds this thread), I mean I went into the C: drive Thunderbird installation and manually deleted the files that had the dates appended as well as the .msf files that had the dates appended. A laborious process, but not really that time consuming in the end comparatively.
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