= Persistent storage :page-nav_order: 2 // SPDX-FileCopyrightText: 2024-2025 Alyssa Ross // SPDX-License-Identifier: GFDL-1.3-no-invariants-or-later OR CC-BY-SA-4.0 Spectrum's root filesystem is immutable, so if you want to be able to persist data between sessions, you'll need to create a persistent storage partition. Spectrum comes with `cryptsetup`, and in future is likely to assume that btrfs-specific features are available. Persistent storage can be mounted as follows: [source,shell] ---- cryptsetup open /dev/sda1 userdata mount-userdata /dev/mapper/userdata ---- It's not mounted automatically, because generally the partition should be encrypted, meaning a key has to be supplied to mount it anyway, and because there might be multiple persistent data partitions to choose from.