Having a heck of a time getting this working in my BRZ with the factory X9310BT. Detects the card just fine, but I never get the upgrade message. Formatted on a PC (native OS as well as SDformatter), as well as tried on a Mac. Extracted with winrar, 7zip, and Thearchiver (mac). This 4GB card was previously used successfully to replace the startup screen, so it reads fine. All I get when inserting is the page that shows screensaver options/etc. What could I be missing?