the first time you run kanboards a directory with the same name will be created in your home directory
import/export from/to YAML with i and e when at main screen
YAML file is placed in the kanboards directory
you can only import into an empty DB, if there are already projects loaded i will do nothing
You can just copy the .db file instead of the .yaml one and it will be just as portable, as long as the files are placed in HOME/kanboards/ but i wanted to do something with YAML so there you go. :)