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How to add a copied local folder from one computer to another?

I have a folder with the sbd extension copied to a pendrive.

I placed it in the location: C:\Users\............\AppData\Roaming\Thunderbird\Profiles\..........\Mail\Local Folders. However, when I opened Thunderbird, it did not add itself to the local folders

Do I need to force synchronization in some way?

PF

I have a folder with the sbd extension copied to a pendrive. I placed it in the location: C:\Users\............\AppData\Roaming\Thunderbird\Profiles\..........\Mail\Local Folders. However, when I opened Thunderbird, it did not add itself to the local folders Do I need to force synchronization in some way? PF

Chosen solution

Open the .sbd folder. Is there a file with no extension and an .msf file, such as File and File.msf? Copy File to Mail/Local Folders, with TB closed, then restart TB. Does the File folder appear under Local Folders in the Folder Pane?

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Chosen Solution

Open the .sbd folder. Is there a file with no extension and an .msf file, such as File and File.msf? Copy File to Mail/Local Folders, with TB closed, then restart TB. Does the File folder appear under Local Folders in the Folder Pane?