SteamOS boot from external device

[RickyAsbury]

Your system information

• Steam client version:any
• SteamOS version: any
• Opted into Steam client beta?: [Yes/No]
• Opted into SteamOS beta?: [Yes/No]
• Have you checked for updates in Settings > System?: [Yes/No]

Please describe your issue in as much detail as possible:

Describe what you expected should happen and what did happen.

Steps for reproducing this issue:

What I want to say is on windows for steam deck Sonic Frontiers crashed so because I have a 64GB model I was going to ask how do I get steam OS to run on an external storage devices