Valve posted a new video on the Steam Deck, in this case, showing how to take it apart. Interestingly, throughout the video they insist on not doing it since any damage produced will void the warranty, although they still show the procedure for those who decide to take the risk.
Take a look inside Steam Deck™!
Due to its compact size, the Steam Deck has an internal design with each part practically made to measure, with many small parts or very close to each other, making it more difficult to repair or exchange parts. A clear example of this is its SSD, which although it uses a standard M.2 2230 format, has a shield for electromagnetic interference since it is located next to the Wi-Fi and Bluetooth antennas, and Valve warns that if it is Replace with another SSD that does not have this protector, its performance could be compromised, so it is not recommended to change the SSD even if you get another one with this format.
Some components can be exchanged, such as their joysticks, since Valve will sell official replacements to repair them in case of any failure. Official replacement parts will also be sold for some other proprietary designed components, although the full list has not yet been detailed.
The Steam Deck will hit the market later this year, so we will have to wait to see what spare parts the company offers and if any company decides to launch special SSDs for the Steam Deck with M.2 2230 format and a shield for electromagnetic interference, facilitating the expansion of its storage.