This 2TB Micron M.2 2230 SSD is perfect for your Steam Deck, and

MICRON/CRUCIAL 2400 M.2 M-Key 2230 PCIe4 NVMe SSD 1TB 2TB ROG Ally Steam Deck $125.00 - PicClick AU

Sharge Disk review: This terrific M.2 2230 SSD enclosure has active cooling — and it works with the Steam Deck

SABRENT Rocket Q4 2230 NVMe 4.0 2TB High Performance PCIe 4.0 M.2 2230 SSD Compatible with Steam Deck, ASUS ROG Ally, Mini PCs [SB-213Q-2TB]

iFixit is offering Steam Deck SSD upgrade kits going all the way up to 2TB

Best SSDs 2024: From Budget SATA to Blazing-Fast NVMe

Inland TN436 1TB 3D TLC NAND PCIe Gen 4 x4 NVMe M.2 2230 Internal SSD - Compatible with Steam Deck - Micro Center

The Best SSDs and Storage - Early 2024

Micron's new NVMe M.2 SSDs can pack 2TBs into 2230 form factor

Sabrent Rocket 2230: A Small Form Factor NVMe SSD with Impressive Performance

Steam Deck Accessory Roundup 2023 - LanOC Reviews

2tb 2230 Steam Deck : r/SteamDeck