Android Question Can see files with Bridge but not in Explorer with USB connection

Hi,
I create some csv log files and save them in DirExternal/MySubFolder.
If i use the FTP explorer built into B4A bridge, I see the files:


If I plug the tablet into USB and look in Windows Explorer, I can't see them:


What can I do to make them visible? I get the same thin g if I save them to my Downloads folder. Thanks.