Many original 2015 R4 cards suffer from an integrated This is a software code embedded by the original manufacturers that forces the firmware to stop working after a specific calendar date, displaying a red "Menu" error screen.
If the original firmware is dead, you can use , a modern homebrew menu that bypasses flashcart restrictions entirely. This is the best long-term solution for 2015 cards. Summary Checklist MicroSD Card Format to FAT32 (up to 32GB) Firmware Source r4i-sdhc.com or community forks File Location Root directory of the MicroSD card If "Error" Appears Change system date to 2015 r4 sdhc 2015 dual core firmware