Go update your cart, then go play Star Fox 2 the way Argonaut intended.
But here is the hard truth:
However, A dying SD card will corrupt the file before it writes, causing headaches. Use SanDisk, Samsung, or Kingston. One Last Pro Tip: The "Boot Test" After you update, hold down the L and R buttons on your controller while the cart boots up. This launches the diagnostics menu. Run the "SD Card Test." If it passes, your firmware is solid and your SD card is healthy. The Bottom Line The FXPak Pro is the Ferrari of flash carts, but even Ferraris need oil changes. Check for firmware updates every 3-4 months. The developers are constantly finding new ways to trick the SNES hardware into doing things it was never meant to do. fxpak pro firmware
If you are reading this, you likely already own the ultimate flash cart for the Super Nintendo: the FXPak Pro (formerly known as the SD2SNES). You’ve experienced the bliss of loading the entire SNES library from a single microSD card. You’ve marveled at the flawless emulation of special chips like the Super FX (Star Fox) and SA-1 (Super Mario RPG). Go update your cart, then go play Star