A Network Attached Storage (NAS) device is a dedicated file server on your local network, providing centralized, always-on storage accessible to every device in your home or office. The three dominant platforms — Synology DSM, QNAP QTS/QuTS Hero, and TrueNAS (Scale/Core) — span a spectrum from polished turnkey appliances to bare-metal ZFS powerhouses, and choosing the right one shapes every downstream decision about hardware, RAID, apps, and backups. The single most important mindset shift for new NAS owners is recognizing that RAID is not a backup: redundancy protects against drive failure but not against accidental deletion, ransomware, or site disasters, so a 3-2-1 backup strategy must complement any RAID choice.
What This Cheat Sheet Covers
This topic spans 16 focused tables and 110 indexed concepts. Below is a complete table-by-table outline of this topic, spanning foundational concepts through advanced details.
Table 1: Platform Comparison — Synology DSM vs QNAP QTS/QuTS Hero vs TrueNAS
Choosing the right NAS operating system is the foundational decision that determines your hardware options, app ecosystem, and long-term maintenance burden. Synology, QNAP, and TrueNAS target different user profiles and make very different engineering trade-offs.
| Platform | Example | Description |
|---|---|---|
DS923+ running DSM 7.2; Package Center apps | Best-in-class ease of use; polished GUI, strong ecosystem of first-party apps (Hyper Backup, Surveillance Station, Photos); locked to Synology hardware; uses EXT4 or Btrfs. | |
TS-464 running QTS 5.x; App Center | QNAP's standard OS using EXT4; more exposed hardware knobs than DSM; broader hardware variety; app ecosystem slightly less polished than Synology. | |
TS-h886 running QuTS Hero h5.x | QNAP's ZFS-based OS; brings OpenZFS data integrity to QNAP hardware; available only on select x86 models; closer feature parity with TrueNAS for storage purists. |