The Folder selection screen is Shows the source and destination root folder. This is the folder the migration happens (and sub folders)
Choose the source (1) and destination (2) root folders in the treeview. The list view to the right of the tree is for information only,helping you confirm the root folder is correct by viewing the contents of the selected folder.
The type can be Root and Folder selecting either is OK.
The type can be Root,Site and Folder. You must select a Folder. Failure to select a folder will give a warning message