Itβs an incredibly frustrating scenario: You use multiple MicroSD cards interchangeably on your Steam Deck to manage an oversized library. One day, you slide a card in, and instead of displaying your games, SteamOS panics and greets you with a terrifying prompt: **"Format drive to use it."**..
I recently got a new [512GB MicroSD card](https://www.amazon.com/dp/B0CWPPMD8W) for my Steam Deck. After inserting it, SteamOS didn't recognize it. Here's how I fixed it via SSH...