FATXplorer was already the first program to support USB devices, but I decided to take it one step further. I will not reveal many technical details as of now, but I found out what the certificate in the first data file protects and the discovery may lead to custom sized USBs on retail, if not JTAG.

So that means you could possible use a USB larger than 16gb and one smaller than 512mb.

Lots of testing is needed, but I have high hopes for this.