Copy the DXF file to a USB memory stick and plug the stick into the TSC3.
Then, copy the file to the device.
There's no need to use TBC.
Remember, these DXF files were created to work easily with any software and any device.
I also recommend saving the DXF file in one of the older versions. Things always seemed to work better back then.
The latest DXF versions don't always behave as you'd expect a proper Drawing Exchange File to.These latest versions of DXF have half the drawing missing