Where can I find my contacts that I synced onto my Mac?

I just synced my iPhone to my Mac laptop and I'm wondering where I can find them. And also, if you know, can I import them to a flash drive?

AddressBook.app in OS 10.7.4 or earlier

Contacts.app in OS 10.8 or later

"can I import them to a flash drive?"
You "copy" a file to a drive, not import. You import a database or other list file into an app. See the link below.