I just installed Thunderbird on a new laptop, and tried to import from the profile file from my old laptop. My email accounts imported correctly, but not my local folders. I can see the sbd and msf objects in the profile folder, but Thunderbird isn't picking them up when it's restarted. I thought I should try exporting from the old installation, but there's too much data (6Gb of saved emails). The Export function suggested I should "back it up" by myself, but I reckon that's equivalent to what I described above. Please can someone help?