Windows and Bazzite on One Device | MSI Claw Tutorial

Unlock the full power of your MSI Claw and Onexplayer X1 Air handheld gaming PC by dual-booting Windows and Bazzite/SteamOS Linux — and use ONE shared game drive so you never install your games twice!

In this guide, I walk you step-by-step through installing Bazzite, creating the proper partitions, enabling a shared BTRFS game library, and setting up dual-boot on devices like the OneXPlayer X1 Air, MSI Claw, ROG Xbox Ally, Lenovo Legion Go, and more.
You’ll learn:
✔ How to safely split your SSD into Windows + Bazzite + Shared Game Drive
✔ How to correctly configure EFI, EXT4, and BTRFS partitions
✔ How to mount shared storage on both Linux and Windows
✔ How to use WinBTRFS to read BTRFS drives inside Windows
✔ How to fix BIOS/boot order issues (Secure Boot, BitLocker, etc.)
✔ How to switch between OSes smoothly
✔ What sizes to dedicate to each partition (Windows / Bazzite / Shared)
✔ Troubleshooting tips for MSI Claw, X1 Air, and similar handhelds

If you want SteamOS-level performance and Windows compatibility on one device, this is the setup you want.

🔥 Links, tools & installers referenced
Bazzite installer
https://github.com/ublue-os/bazzite
Full Bazzite dual instructions:
https://docs.bazzite.gg/General/Installation_Guide/dual_boot_setup_guide/
Ventoy / Rufus / Balena Etcher:
https://www.ventoy.net/en/download.html
https://rufus.ie/en/
https://etcher.balena.io/
MiniTool Partition Wizard
https://www.partitionwizard.com/download.html
WinBTRFS
https://github.com/maharmstone/btrfs

⏱️ Timestamps
00:00 – Introduction: Why dual-boot handheld PCs
00:23 – Game sharing limitations (Steam vs Game Pass/Epic)
00:46 – Recommended Windows partition sizes
00:50 – WARNING! BitLocker warning (MSI Claw caution)
01:15 – Why you’d want Bazzite (performance, eGPU, VR support)
01:41 – What you need (USB drive, keyboard, adapters)
02:15 – Partition planning (Windows / Bazzite / Shared sizes)
02:50 – Creating the Bazzite Installer or SteamOS Installer
03:12 – Shrinking/extending partitions
04:00 – Example configuration (1TB SSD breakdown)
04:45 – Rebooting into BIOS (X1 Air + MSI Claw methods)
05:00 – ONEXPLAYER X1 Air USB NOTICE
05:17 – Secure Boot/Fast Boot settings + USB boot order
05:34 – Starting Bazzite installer
05:51 – Choosing install destination
06:22 – Creating required partitions (EFI, Boot, BTRFS)
07:03 – Creating BTRFS subvolumes
08:02 – Creating shared game drive partition
08:30 – Changing Administrator and User login
08:55 – Enabling write access in linux desktop mode
09:38 – Rebooting to Windows / Handheld Daemon
09:56 – Installing WinBTRFS on Windows
10:20 – Labeling partitions in Windows
10:40 – Changing boot priority in BIOS
11:00 – Final notes + ad + outro

Got questions or need advanced troubleshooting? Drop a comment — angry ones included 😄
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