A home-backup NAS should be easy to maintain, large enough for several years of growth, and paired with a second backup destination. RAID reduces downtime after a drive failure, but it does not protect against deletion, theft, fire, or ransomware.
Research-backed builds by tier
Each article combines the exact NAS and HDD records with official facts, independent reviews, YouTube material, and community discussion.
DS223 + 2 × 4TB
About 4TB usable · $561.17 reference total
A researched entry home-backup NAS build using Synology DS223 and two exact 4TB IronWolf drives, with 4TB usable, setup steps, limits, and sources.
Read the full tier analysis →MidrangeDS925+ + 3 × 12TB
About 24TB usable · $1,734.96 reference total
A source-backed Synology DS925+ home-backup build with three exact 12TB IronWolf drives, about 24TB usable, one open bay, and a 3-2-1 plan.
Read the full tier analysis →High-endDS1825+ + 6 × 16TB
About 64TB usable · $5,503.99 reference total
A researched DS1825+ high-end home-backup build using six exact 16TB IronWolf Pro drives, dual parity, about 64TB usable, and two open bays.
Read the full tier analysis →Questions to answer first
- 1How much data exists across every computer, phone, and external drive?
- 2How many years of file history and snapshots should remain available?
- 3Where will the independent second copy live?
How to choose
Start with current data, add three to five years of growth, then keep roughly 20% free.
Choose two bays for a simple mirror; choose four bays when capacity will grow or multiple jobs share the NAS.
Prefer straightforward backup software and administration over unused processor features.
Avoid these mistakes
- Treating RAID as the only backup
- Buying raw capacity instead of protected capacity
- Ignoring restore testing
Open the current shortlist
Compare entry, midrange, and high-end NAS systems, exact HDD SKUs, and complete bundles selected for this job.
View home backup recommendationsCapacity figures are decimal planning estimates before formatting and filesystem overhead. RAID improves availability after a drive failure; it is not an independent backup.