Time Machine makes copy of entire system and all files. But what about Thunderbird app? It allows to save passwords. 1) Will Time Machine make copy of Thunderbird's password file to external hard drive? 2) Is there any security risk if password file is scanned and copied like this? Could it become vulnerable or could data leak? What's Apple's data policy with such things? Or will the password file simply be copied to external hard drive and data inside is safe and not touched?