Flipper Zero uses a slower energy-efficient SPI interface, but low-quality microSD cards may have a poorly implemented or unsupported SPI mode.
We recommend using high-quality, branded microSD cards such as SanDisk, Kingston, and Samsung.
- Make sure that the microSD card used supports the SPI mode.
- If the microSD card is detected, but your Flipper Zero shows a "Mounting SD card failed" error, try formatting the microSD card:
Go to Main Menu → Settings → Storage → Format SD card.
- If you are using a high-quality microSD card but still experiencing problems, it is possible that the microSD slot on the device may require cleaning.
In this case, carefully clean the microSD port with compressed air or a toothpick.