Not wanting to lose my modded New Vegas/Skyrim, emulators, non-Steam games, etc. I decided to swap internal SSDs, I know there was some questions about the possibility of it so I’m here to confirm you can do it.
LCD Deck was updated to SteamOS 3.5 Stable, OLED Deck not updated at all. Upon swapping SSDs the OLED Deck greeted me with a “you are one of the first OLED Deck owners and we need to update the console” message (must’ve known from the motherboard). Upon updating everything the OLED worked as it should. The LCD Deck black screened for awhile then started up without any audio, also needing an update. Once that was done it worked as normal and greeted me with the first time setup menu.
Also just swapped SSDs, as I had upgraded my LCD deck with a 1 TB drive from Microcenter. The only thing is that the ribbon cable on the OLED deck goes over the metal heatshield, so it was a little tricky carefully lining the SSD up into the slot with the heatshield still semi-attached.
I love this OLED Deck though. The screen is freaking gorgeous!