How should I reformat and organize my old games and storage partitions on CachyOS?

A simple approach is to format the games partition as Ext4 and use either Ext4 or Btrfs for the general storage partition. The filesystem choice doesn’t control whether Dolphin shows the partition in Places—the mount location and a file-manager shortcut do. GParted can handle the partition changes, but it won’t automatically set up all your preferred mount points, so you may need to finish that configuration afterward.

You can format or delete the old partitions in GParted, provided you’ve backed up anything important and confirmed you’re selecting the correct disks. Make sure the partitions aren’t mounted before changing them. After formatting, give each filesystem a label such as “Games” or “Storage,” then mount them wherever you like. You can configure persistent mounts through `/etc/fstab`; once mounted, Dolphin should display them, and you can also add shortcuts to the Places sidebar.

They don’t need to use Btrfs just because your system partition does. Ext4 is a straightforward choice, especially for a games partition. If you use Btrfs for games or virtual machines, disabling copy-on-write is often recommended because those workloads can suffer from unnecessary CoW overhead. Btrfs can still be useful for general data storage, though.