Ensure your SD card is formatted to FAT32 . Many modern cards come as exFAT, which the FA4 bootloader may not recognize during the update process.
Use a card formatted to FAT32 (usually 32GB or smaller is safest for the update process). F.audio Fa4 Firmware UPD
If you are a member of the audiophile community, you know that the is a powerhouse of a Digital Audio Player (DAP). Known for its robust build and impressive dual-DAC architecture, it delivers a clean, analytical sound that punches well above its weight class. Ensure your SD card is formatted to FAT32