This is a free USB driver for the NetUSBee cartridge for the Atari ST/TT/Falcon. For TOS and EmuTOS. It is released under the GNU General Public License (GPL). No warranty. No support. 

The order in the AUTO folder should be:
USB.PRG
STORAGE.PRG
NETUSBEE.PRG

Don't forget to place the USB.ACC in the root of your boot drive.

For now only mass storage (USB drives) is supported.

Here is the link to the source code: https://github.com/freemint/freemint