The MMC HAT (Hardware Attached on Top) adds a second microSD socket to your Raspberry Pi using the second SDIO interface.
The MMC HAT has many uses including:
- Micro SD card reader. Write new images, repair or modify existing Raspberry Pi installations with ease.
- Additional storage, mount as your home directory or for general storage or backups.
- RAID1 on the root (/) partition for added reliability.
The MMC HAT can be purchased either via one of our resellers or direct.