Dell P/N: RPN7J, 0RPN7J. This motherboard part number does not support a M.2 storage drive- the storage is on-board the motherboard and is not upgradeable. On-board eMMC Storage: 64GB. NOTE: This motherboard part number does not support a M.2 storage drive- the storage is on-board the motherboard and is not upgradeable.
eBay