Fedora Will Start Replacing Its Default File System Ext4 To Btrfs From Fedora 33

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Btrfs Coming to Fedora 33 - Fedora Magazine

by Chris Murphy and Langdon White User data is the most important thing on a computer. Whether it's source code for the next big release, family pictures, a music library, or anything else, you want it to be safe. Changing the default file system is not a change to make casually.