I would like to ask what model of screen you are using?
If you are using a STV series screen, you just need to insert the USB drive into your computer (make sure there are no other files on the USB drive) and click download to USB drive in the UI software interface.
If you are using the STW series screen, you need to connect the screen to the computer and power it on, then click compile in the UI software to bring up the file directory, click assets in the path, and copy the entire default folder to the screen.
The bin folder was created as a way to update the firmware, not to copy the project files.