To migrate file data from a specific folder of OneDrive/Dropbox, you need only to specify the folderId in the “Create a new User” or “Edit User” interface.
To migrate the contents of SubFolderOne, the relative path is /FolderOne/SubFolderOne:
Example with Google Drive:
If you want to migrate from a folder whose identifier is “1wmYqzt7jF1lcAy9E_9-tD0f2nYiHTOn7”, you have to mention this FolderId when you specify your source Email address:
Source Email address: email@example.com.
FolderId: “1wmYqzt7jF1lcAy9E_9-tD0f2nYiHTOn7” (You can find this identifier on the web site link as shown below).
How to find FolderId in Google Drive: