Example to show the behavior of the button "Transfer Subdirs".

Start situation:

Mr. X wants to transfer all files of type ".txt" inside the folder "c:\MyFiles" to his 2nd computer.
So he entered *.txt in the file selection dialog.
The checkbox "Transfer subdirs" is selected.

Folder structure of the sender: green: Folders red: Files
e.g..
c:\MyFiles\

BaseDocument.txt

Office\

DocumentA.txt

Cooking\

appetizer\

pudding.txt

Tennis\

CalenderSummer.txt

After the transfer the following structure had been created at the receiver PC.

?:\somewherehehasselected\

BaseDocument.txt

Office\

DocumentA.txt

cooking\

appetizer\

pudding.txt

Tennis\

CalenderSummer.txt

You see , that all matching subfolders had been transfered.

If Mr.X hadn't checked the box transfer subdirs, the he had got the following structure at the receiver side.
?:\somewherehehasselected\

BaseDocument.txt

All subfolders will not be transfered in that case.