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NAS Buying Guide 2026: Drives, RAID, and What Specs Actually Matter

Last updated: 2026-09-02 · By NicheHive Editorial

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Choose a NAS based on the number of drive bays, CPU for transcoding, and RAID level for redundancy. This guide explains RAID 1, RAID 5, and SHR, and how to select compatible NAS hard drives.

Buying a NAS looks simple until you're staring at a spec sheet full of bay counts, RAID acronyms, and drive families you've never heard of.

None of it is complicated once you break it into the three decisions that actually matter.

First, the enclosure: how many bays, and how much CPU. Second, the drives: capacity, brand, and whether they're actually rated for NAS use. Third, the RAID level, which determines how much redundancy you get and how much usable storage you give up for it.

This guide walks through each decision so you can buy the right box the first time instead of replacing it in a year.

How Many Bays

2-bay: The entry point for home NAS. With RAID 1, both drives mirror each other — you lose half the raw capacity to redundancy. Two 8TB drives give 8TB usable. Expandable only by replacing drives with larger ones.

4-bay: Better long-term value. With RAID 5, you lose one drive's capacity to parity and get the rest for storage — four 8TB drives give approximately 24TB usable. Can expand by adding drives to empty bays.

5-bay and above: For media-heavy households, video production, or home offices with large storage needs.

CPU Requirements

Basic file storage and backup: Any NAS CPU is adequate. Intel Celeron or ARM processors handle file serving and backup tasks without load.

Plex or Jellyfin with hardware transcoding: Intel Celeron with Quick Sync (DS220+) handles 1080p with Plex Pass hardware transcoding. AMD Ryzen (DS923+) handles software 4K transcoding.

Surveillance station or intensive apps: AMD Ryzen or Intel Core NAS options required.

RAID vs No RAID

RAID 1 (mirror): Single drive failure protection. Requires 2 drives minimum. Simple to set up. Data accessible from either drive independently.

SHR (Synology Hybrid RAID): Synology's simplified RAID. Manages redundancy automatically and allows mixing drive sizes. Recommended for home users who want redundancy without manual RAID configuration.

JBOD (no RAID): All drive capacity is usable. No redundancy — one drive failure loses its data. Only appropriate when drives are independently backed up elsewhere.

Frequently Asked Questions

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