Brother PE900 USB Thumbdrive Format
I wanted to share something to the larger community for someone who is good at low level computer stuff and also interested in machine embroidery.
The Brother series of machine embroidery machines can accept, according to brother, FAT32 USB Drive formats, that may be true. However if you have a bunch of USB drives around that you've formatted before you may notice it doesn't work in your machine and gives you a "The USB media cannot be used" error. It may also be possible to use exFAT but try to use FAT before hand.