Hi,Once your connection is local mode, it will not consume the remote data, and you can check the connection mode on My devices list.
Thank you for your feedback.
When you connection mode is remotely, it will consume the remote data so you can connect your phone and pc in the same LAN.
When you are in local connection mode it will not consume the remote data and you can transfer the file in any size.
Feel free to let us know if you need further help.
Best Regards,