The 2230 M.2 SSD that Valve integrated within the Steam Deck can be accessed and even replaced with a larger capacity model. However, performing such an upgrade could shorten the device's life.
Build 22623.730 (KB5017385)
Windows 11 Preview in Beta Channel comes with Tablet-optimized taskbar
windows 11 insider preview
Windows 11 Dev Channel finally brings Task Manager with a right click, and more
windows 11 promo