Is Steam Deck unable to format SD card? Learn how to correctly install and format an SD card on Steam Deck by following the instructions mentioned in this post.

If your card has a physical switch for write-protection, ensure it is turned off. How to format SD cards on Windows Formatting an SD card, while simple, is a process that comes with risks.

The Steam Deck will format the microSD of your choice into the Linux-based format, EXT4, so long as you use any compatible SD, SDXC, or SDHC microSD card, you're good to go.

A Steam Deck comes with 64, 256, or 512GB of onboard storage that you can expand with a microSD card. Here’s how to install and format the best cards.