Export or backup contacts with pictures When exporting contacts from the standard contacts application to the disk and importing them to Thunderbird - the pictures are missing.

I'd like to export all contacts with pictures though.

Is there a way to get a 100% backup of my contacts? Where are they stored and how can I back them up?
User @Izzy explained that encoded pictures are actually included in the .vcf created from the export.

This led me to think that the issue is actually with Thunbird's contacts import and not with android's contacts export. As it turns out this is right.

Since the default way for Thunderbird to import vcards appears to be faulty, I used the add-on MoreFunctionsForAddressBook to import the address book. It worked fine and included all the pictures!