2014 F30 Software Update Issue

[NDA]

I am new to F30's but not BMW's. I recently purchased the vehicle in the subject line.  I went to bmw.com/update and downloaded the newest update for her.  I formated my usb, copied the file over from computer.  placed usb in slot under arm rest.  went to settings and selected update software.  The car keeps saying no media on usb.  Is there a coding for the usb plug that needs updating to read this file.  I can plug my iphone into the usb port and it charges. Any assistance would be greatly appreciated.

Joseph