Steam Deck

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A place to discuss and support all things Steam Deck.

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[PSA] Swapping your Deck's filesystem to Btrfs is easy to do, and can give you more space for free (gitlab.com)

submitted 1 year ago* (last edited 1 year ago) by Fubarberry@sopuli.xyz to c/steamdeck@sopuli.xyz

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Btrfs is a filesystem (like FAT, NTFS, and ext4), but has some distinct advantages:

Increased storage - thanks to compression and file deduplication, Btrfs can save you considerable amounts of storage. I have 517G of files on my Deck's SSD, but it only uses up 410G of storage to hold those files. Compressing your filesystem can also shorten load times, especially for slower memory devices like the SD card.
Snapshotting - save snapshots of the file system and easily roll back if there's a problem.

Converting to Btrfs is easy to do, and doesn't require having you to resetup/reconfigure your deck. The linked gitlab project will do the conversion, keep all your existing files and settings, and set all the Btrfs configurations for you. The file conversion will persist through updates, and it will setup automatic deduplication of files on the drive. It also allows the Deck to automatically mount Btrfs converted SD cards, and to format new cards in the same format.

Only potential downside I know of is that Btrfs is case sensitive, where the default ext4 on the Deck uses casefolding. Basically this means that Btrfs will treat File.txt and file.txt as two different files. I've never run into any issues with this, but I've heard it can cause issues with some specific mods that inconsistently capitalize their files. There's also always some risk whenever you make dramatic changes to your filesystem, but I haven't really heard of anyone having problems with this. You do have to make sure you have at least 10-20% of your storage free (and a min of 10-20GB free for smaller drives) to make sure it has room for the conversion.

Overall I've been using Btrfs for over 6+ months on my deck, and it's been great. I highly recommend it. I'm not an expert on it, but I'll do my best to answer any questions on it.

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[–] Luci@lemmy.ca 4 points 1 year ago

To get around the case folding issue you could mount your steamapps/common folder as a loop device with ext4 with case folding support. The virtual device should follow the compression settings without too much issue but deduplication won't be an option and snapshots may be larger.