Amazon.com: PC SN530 256GB M.2 2230 NVMe PCIe Gen3 x4 SSD Solid State Drive SDBPTPZ-256G-1012 Compatible Replacement Spare Part for Western Digital Compatible and Laptop Systems : Electronics
M.2 SSD Protect Card Test Tool Extension Card M KEY B Key B+M KEY Test Board for SATA/NGFF NVME/PCIE M2 2230 2242 2260 2280 SSD
1TB M.2 2230 NVMe PCI Express 3.0 x2 SSD (Solid State Drive)-30mm Half Size, Brand : Samsung PM991 MZ-VLQ1T00, KLFGGAR4AA-K0T0 For Microsoft Surface Pro X, Microsoft Surface Pro 7+, Microsoft Surface Laptop
Steam Deck has M.2 2230 SSD slot, but Valve does not recommend upgrading it - VideoCardz.com