Moving Thunderbird Win 10 to Win 11 25H2
Hi, Sorry to be a nuisance but I have tried all the suggestions to migrate T/bird complete and nothing works, I have been extremely careful that Thunderbird has been closed before making actions. It is a new and "empty" Win 11 25H2 machine.
The second Mozilla suggestion is impossible as my appdata/local folder has many files and is enormous, it does not seem to have a user name in the address either.
Any guidance would be greatly appreciated, or I will have to manually make a clone of Thunderbird with the email accounts and refer to the W10 machine for stored mail until these become too old to be of interest.
Chosen solution
Thanks Matt I think I have it and it both appears to be all there and is sending and receiving emails, although it failed first time when I simply repeated your actions in reverse.
What I needed to do was copy all the files into the sfkyk7u4.default-release folder, not over the highlighted files already in there which is what comes up when you click the T/bird show folder button.
I may have indeed misunderstood your directions. (Old and easily confused.)
I am much obliged, many thanks
Richard.
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lets take this a big bit at a time.
On your "old" machine open the troubleshooting information on the help menu. Click the open button for the profile folder
You should now have a windows file explorer window open showing a path at the top of the screen and a load of files. Perhaps many gigabytes of them. Check that one of those files is prefs.js just to be sure you are in the right place and then close Thunderbird. That is your profile folder and everything needs to be copied to a USB drive, so make sure you have one with enough space free. In the windows file manager press Ctrl+A and everything in the file list should be selected, now drag that to your USB drive to make a copy.
Now on your new device open Thunderbird and repeat the steps to open the profile folder from troubleshooting information. Close Thunderbird. Copy the entire contents of the old profile folder into the new profile folder. You will be prompted to replace files and you should. If you are not prompted to replace files than you are almost certainly copying the files in the wrong place.
Once the copy of the files and folders is complete start Thunderbird and it should just run with your old data. Note that this replaces anything in the new installations active profile folder without an undo option.
Thanks so much Matt
That was an unexpectedly fast reply and much appreciated. Your suggestion is quite different from the actual Mozilla instructions. It is my wife's lap-top newly arrived from the UK, so we get an English OS and more importantly UK keybpard and with a new W11 installation included. The French AZERTY keyboard is impossible !! We are I think a waking day apart, I'm a real retired OF and live in France. I have a 128Gb USB stick, we'll see if that does it and I'll report back later.
Many thanks
Richard.
Chosen Solution
Thanks Matt I think I have it and it both appears to be all there and is sending and receiving emails, although it failed first time when I simply repeated your actions in reverse.
What I needed to do was copy all the files into the sfkyk7u4.default-release folder, not over the highlighted files already in there which is what comes up when you click the T/bird show folder button.
I may have indeed misunderstood your directions. (Old and easily confused.)
I am much obliged, many thanks
Richard.
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