I have a BMP9 embroidery machine 6 needle.
I down load designs and transfer them to my machine from my computer.
Looks like you have a single needle machine.
If I understand it correctly and from what I found you need a USB cable.
That will hook up from the computer to your machine.
there should probably be prompts for you to follow on both machine and laptop after connecting.
I order my designs on line and download then.
I have to get my designs in a PES format.
I don't know for sure but being a brother machine, yours may also be PES format.
I don't know if I can help you more than that.
Read through your owners manual or call the company you bought from if you need more help.