# Immich NAS Storage Sizing Guide: Bays, Drives and Usable Capacity

Canonical: https://cloudzat.com/immich-nas-storage-sizing/

Purpose: Immich storage buying guide.

Decision: For a growing family photo library, four bays are often a more flexible starting point than two because they allow parity-style layouts and a wider expansion path. Larger 10TB or 20TB libraries can justify six or eight bays when the goal is to avoid replacing every drive at the next growth step. Buy the NAS diskless when you want explicit control over the exact drives and warranty channel.

- Flexible starting point: 4 bays — Often a better growth path than a two-bay mirror for a family library.
- Large libraries: 6–8 bays — More bays can lower the required capacity per disk and broaden protection choices.
- Drive purchase: Diskless NAS + chosen HDDs — Buying diskless keeps the enclosure decision separate from drive model, capacity and warranty.
- Application tier: Keep a local SSD — The NAS can hold originals while a local SSD handles the database and application layer.

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