I found this thread that indicates EXP is probably the format you want. If you have a usb, I would think you can download the embroidery format to a thumb drive and transfer the thumb drive to your machine.
https://sewing.patternreview.com/Sew...ns/topic/84496
Also found this info about Bernina embroidery format:
https://www.embroideryonline.com/t-faqexpbernina.aspx
According to the latter website, Bernina EXP requires two additional files. You need all three.
Edit: If you go to the link below and download the user's manual using the "view in browser" option, you can search on USB to get directions on exactly how to download embroidery files from your USB stick.
http://www.manualslib.com/download/7...na-750-Qe.html