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A Script to (Un)Mount and Setup Auto-Mount for an External USB SSD on the Steam Deck

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Steam-Deck.Mount-External-Drive 3.5

Script to Auto-Mount NTFS, BTRFS & exFat SDCards, External USB Drives (or SSD Docks) & Internal Partitions (If you Dual-Boot) on the Steam Deck

NTFS & BTRFS Partitions containing a SteamLibrary at root level or in a folder named SteamLibrary will automatically be added to Steam, exFAT isn't supported as a SteamLibrary but will be Mounted for use with other Launchers or for Media/ROMs etc.

"This is cool! How can I thank you?"

Why not drop me a sub over on my youtube channel ;) Chinballs Gaming

Steam OS 3.5 Now supports Ext4 external Drives out the box so see Uninstall if thats all you need!

How does this work?

This script is basically a mirror of Valves own Auto-Mount script (which lives on SteamOS at /usr/lib/hwsupport/steamos-automount.sh ) adding in support for ntfs, btrfs & exFAT and adding rules for Internal Partitions.

Additional RegEx has been added to the rules to allow he mounting of "Full Disk" Formatted drives (eg ones that don't have a partitions table) so even drives that are eg sda or mmcblk0 as well as sda1 or mmcblk0p1 can be mounted.

SteamOS's rule for this lives at /usr/lib/udev/rules.d/99-steamos-automount.rules and because SteamOS has a Read-Only File System, files in /usr/ cannot be changed without removing the Read-Onlyness, however systemd rules can be overwritten due to how systemd prioritieses directories, so by adding a rule with the same name in /etc/udev/rules.d/ we can override the rule without making changes to SteamOS.

Looking for the old code? see https://github.com/scawp/Steam-Deck.Mount-External-Drive/tree/pre-3.5

a udev rule is added to /etc/udev/rules.d/99-steamos-automount.rules which takes priority over /usr/lib/udev/rules.d/99-steamos-automount.rules this then calls systemd /etc/systemd/system/external-drive-mount@[sda|sda1|sda2|sdd1|etc].service that then runs /home/deck/.local/share/scawp/SDMED/automount.sh to Auto Mount any supported SD/External USB/Internal Partitions.

/etc/fstab is not required for mounting in this way, (however if a Device has an fstab entry these scripts will still work)

Video Guide

https://www.youtube.com/watch?v=Yglf1EKBv2A

Operation

The Drive(s) will be Auto-Mounted to /run/media/deck/[LABEL] eg /run/media/deck/External-ssd/ if the Device has no label then the Devices UUID will be used eg /run/media/deck/a12332-12bf-a33ab-eef/

Installation

Via Curl (One Line Install)

In Konsole type curl -sSL https://raw.githubusercontent.com/scawp/Steam-Deck.Mount-External-Drive/main/curl_install.sh | bash

a sudo password is required (run passwd if required first)

Uninstall

sudo rm /etc/udev/rules.d/99-steamos-automount.rules

sudo rm /etc/systemd/system/[email protected]

sudo rm -r /home/deck/.local/share/scawp/SDMED

sudo udevadm control --reload

sudo systemctl daemon-reload

WORK IN PROGRESS!

This will probably have bugs, so beware! log bugs under issues!

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A Script to (Un)Mount and Setup Auto-Mount for an External USB SSD on the Steam Deck

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