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A GUI window with two tabs at the top: "Planned Devices" and "Current System Devices." The former is focused. Below the tabs, a message says "Final result that will be committed to the system. This graph is updated on every user action." Below that message, there is a directed acyclic graph. The first (top) level has three red boxes, one for each of the storage devices connected to my computer at the time of installation: SDB, an SSD, SDA, an HDD, and SDC, the USB flash drive with the installation software on it. We'll ignore the last one, it isn't relevant here. Descending from the SSD's box is another red box representing a GPT partition table, from which three purple boxes representing partitions branch out and down: one partition for /boot/efi, one partition for swap, and one general partition, /dev/sdb3. Each of these partitions has an arrow going down to a purple box from it, where the purple box represents the LUKS2 encrypted mapping device for that partition. From the encrypted partition for /boot/efi, a green box representing its formatted filesystem is vFAT descends. From the swap partitions encrypted partition, a swap formatted filesystem in a green box descends. From the /dev/sdb3 encrypted partition, a btrfs formatted filesystem descends, but the that btrfs formatted filesystem *also* descends from (and thus combines) a single encrypted partition the size of the entire HDD, meaning that the btrfs filesystem has the total capacity of both partition and HDD.