I think I need a walk-through with links to focus what I'm missing. Short version, I need TBird Android to backup/save private keys so I can take them and import them to TBird in my Kali Linux and Windows installs so everything uses the same keys. Longer story: I'm finally digging in to Thunderbird (coming away from Outlook client) using GMail. I'm doing this because I am beginning to migrate away from Windows to Linux so I need something neutral and capable. As of today I'm not completely off Windows so I need to dual boot for a while. And as a bonus, TBird for Android was just released. First, A month ago I got TBird running in both OS's. I wanted to set up digital signatures and encryption because I'm interested in security and.. why not. Under WIN TBird I started the key generation, but then it pushed me down a road to say I needed to purchase a service from a Cert Auth to use SMIME. Possible would be DigiCert for about $75/yr and I googled and found SSL.com is spoken well about for $14/yr or $20 for 2-yr. I haven't gone that far yet. '''First question.. do I NEED and S/MIME cert to encrypt and sign?''' Now I've discovered TBird for Android was released. I got it going and in its e2e section it also allowed key generation and usage for encryption and signature. Now I'm second guessing the need for the cert. I did that there, published it to keys.openpgp.org, made it public And now I want to sync my new key-set between my 3 instances of TBird. Next issue is that I cant seem to find where I can export/back up my private key from TBird Android. Next I will need to move it to my PC (securely.. not using one drive.. etc) so my 2 instances of TBird here can import it. So like I opened up with, I think I (and maybe the community at large) needs a walk-through of the links to the steps to accomplish setting up encryption, and backing up/moving it over to other instances of ThunderBird. (Wouldn't an account login for TBird be useful to sync settings the way Firefox does right about now?) Thanks all. -Guy