Steam Deck has M.2 2230 SSD slot, but Valve does not recommend upgrading it - VideoCardz.com
GIONEDA M.2 NVME 2230 1TB SSD PCI-Express Gen3.0x4 3D NAND Gaming Internal Solid State Drive for Surface Laptop 3, 4, Pro 7+, 8, X, Steam Deck Internal SSDs - Newegg.com
Addlink New S91 2TB 2230 NVMe High Performance PCIe Gen4x4 2230 3D NAND SSD Compatible with Steam Deck, ASUS ROG Ally, Surface, Mini PCs - Read Speed up to 5000 MB/s - (
Amazon.com: KIOXIA 128GB PCIe NVMe M.2 2230 SSD, Gen 3 x 4, 09946M, KBG40ZNS128G, OEM Package : Electronics
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
Rocket 2230 NVMe 4.0 1TB - Sabrent
NEW T-BingoGo M.2 2230 SSD 1TB NVMe PCIe For Microsoft Surface Pro X Pro 7+ 8 | eBay
Sabrent Rocket Gen 4 2230 1TB M.2 SSD Review - Is this the Smallest and Fastest Storage Combination in the World? | The SSD Review
WD 2TB M.2 2230 SSD NVMe PCIe4x4 PC SN740 For Steam Deck ASUS ROG Flow X Laptop | eBay
Amazon.com: SYONCON AP425 M.2 2230 SSD NVMe PCIe Gen 3.0X4 Internal Solid State Drive Compatible with Steam Deck/Microsoft Surface pro 8/pro 7+/pro X/laptop3/laptop4/laptop go/book3 (512GB) : Electronics