Put your exported albums here. Use structure like

Album_1/
    images/
    thumbnails/
    index.xml
Album_2/
    images/
    thumbnails/
    index.xml

Also possible to specify album date manually instead of date of 'index.xml':

YYYY-MM-DD.Album Name
    images/
    thumbnails/
    index.xml

You could add album group name like this:

Album Name.Group
    images/
    thumbnails/
    index.xml

 or

YYYY-MM-DD.Album Name.Group
    images/
    thumbnails/
    index.xml