I know next to nothing about Thunderbird, other than the mail feature looks somewhat similar to that of Netscape 7.x which I used to use. I've two Dell laptops, one running 32-bit Windows 7 SP1, the other 64-bit Windows 10. I often use either of these laptops on other networks, such that they aren't visible to each other. I've got Thunderbird installed on the Windows 7 PC and have brought down all of my e-mail files from my ISP's POP3 server, leaving the original emails on that server for the time being, until I dare to delete them as I download them. I'd like to be able to store all of these e-mails on a single usb flash drive that I'd be able to plug into either laptop (I intend to periodically back up the flash drive e-mails to a hard drive). I'm concerned with only one e-mail address. If this proves doable, I'll not keep any e-mails on my ISP's server. Does anyone know off the top of their head whether the above is possible? I've downloaded the mozillaZine articles "Moving your mail storage location - Thunderbird" and "Moving your profile folder" (links immediately below), but I haven't yet spent the time to determine whether the profile.ini file(s) are going to be an insurmountable issue or whether there will be additional issues. I'm hoping someone can immediately tell me whether I'm going to be banging my head against a wall. - Thanks. http://kb.mozillazine.org/Moving_your_mail_storage_location_-_Thunderbird http://kb.mozillazine.org/Thunderbird_:_FAQs_:_Changing_Profile_Folder_Location