How to use Steam Deck
Steam Deck access to folders and files in game mode
The gaming mode is a factor in Steam Deck's ease of use, but it is not easy to use when considering it as a PC. In particular, the file access system is not intended in the UI, so there are ways to access folders and files, although they are not available by default.
Where and how to save and access Steam Deck screenshots
Steam Deck allows you to easily save screenshots of your gameplay. The screenshots you take can only be uploaded to Steam by default, but they can be accessed if you know where to save them.
How to access the NAS with Steam Deck
With a maximum storage capacity of only 512 GB, Steam Deck can make good use of a NAS (network disk) to make room for storage.