# Thunderbird Configuration on Windows for Secure Mail [[Prev|thunderbird3]] | *step 4 of 17* | [[Next|thunderbird5]] ## Configure Copies & Folders 1. Another customization option is on where to store copies * If you choose Local Folders performance is generally better * You may want to Bcc yourself by default on mail you send 1. Proceed to the [[Next|thunderbird5]] step [[!img tbird4.png align=left]]