For most home users, the best NAS for backup is the one with the best backup software. Not the fastest CPU or most drive bays. A backup NAS runs scheduled jobs, protects against drive failure via RAID, and provides a path to cloud offsite storage. The hardware requirements for this are modest: any modern 2-bay NAS with 2GB RAM handles daily backup of 3-5 PCs without strain. The software matters far more. This guide compares the best 2-bay home backup NAS options across backup application quality, PC agent support, cloud destination options, and AU retail pricing. With clear recommendations by use case.
In short: For a home with 2-5 PCs to back up, the Synology DS225+ is the strongest choice. Hyper Backup and Active Backup for Business are best-in-class. For a simpler 2-drive backup NAS on a tight budget, the QNAP TS-233 is the most affordable option. For users open to a newer platform, the Ugreen DH2300 offers good hardware at a competitive price but less mature backup software.
What Makes a Good Backup NAS?
A home backup NAS should:
- Run automated scheduled backup without manual intervention. Set it and forget it
- Protect against a single drive failure. RAID 1 (2-bay) or RAID 5/6 (4+ bay)
- Back up Windows and Mac PCs. Agent or agentless
- Support offsite cloud backup. Push a copy to Backblaze B2, Synology C2, or similar for offsite protection
- Provide reliable restore. Backup is useless if restore fails. Software with integrity checking and easy restore UI matters
Additional desirable features: Time Machine support for Macs (both Synology and QNAP support this), ransomware protection via immutable snapshots, and email/push notifications on backup success or failure.
Synology DS225+
| CPU | Intel Celeron J4125 quad-core 2.0GHz (burst 2.7GHz) |
|---|---|
| RAM | 2GB DDR4 (expandable to 6GB with third-party SO-DIMM) |
| Bays | 2 × 3.5"/2.5" SATA |
| Network | 2 × 1GbE |
| M.2 slots | 2 × M.2 2280 NVMe (cache only) |
| Key backup apps | Hyper Backup, Active Backup for Business, Snapshot Replication |
| AU Price (approx March 2026) | ~$790 |
The DS225+ is the definitive home backup NAS recommendation for most households. Synology's backup software suite is the strongest in the consumer NAS market:
- Hyper Backup: Versioned, encrypted backup to USB, cloud (Backblaze B2, Synology C2, Amazon S3), or remote NAS. Integrity checking, restore wizard
- Active Backup for Business: Agentless backup of Windows PCs without installing software on each machine. Also backs up VMware/Hyper-V VMs and Microsoft 365 mailboxes. No per-device licence cost
- Time Machine: SMB-based Time Machine destination for Macs. Native macOS backup protocol support
- Snapshot Replication: Btrfs snapshots for fast recovery from accidental deletion or ransomware
The Intel J4125 CPU with 2GB RAM handles all backup tasks comfortably. If you plan to run Active Backup for Business backing up 5+ PCs simultaneously, upgrading to 4-6GB RAM is recommended.
QNAP TS-233
| CPU | ARM Cortex-A55 quad-core 2.0GHz |
|---|---|
| RAM | 2GB DDR4 (fixed, not upgradeable) |
| Bays | 2 × 3.5"/2.5" SATA |
| Network | 2 × 1GbE |
| Key backup apps | Hybrid Backup Sync, Qsync |
| AU Price (approx March 2026) | ~$399 |
The TS-233 is QNAP's entry-level 2-bay NAS and the cheapest backup NAS option in this comparison. At ~$399, it handles basic NAS-to-cloud and PC backup adequately:
- Hybrid Backup Sync: Covers NAS-to-cloud (Backblaze B2, Amazon S3, many others) and NAS-to-NAS replication. Less polished than Hyper Backup but functional for scheduled cloud offsite backup
- NetBak Replicator: Windows desktop backup client that pushes files to the QNAP. More basic than Active Backup for Business. Requires manual agent install on each PC
- Time Machine: Supported on both Synology and QNAP for Mac backup
The TS-233's fixed 2GB ARM RAM and lack of QNAP's business PC backup integration make it weaker than the DS225+ for multi-PC households. But for a single-person or small household just wanting RAID 1 protection with cloud backup of NAS data, it delivers the basics at half the price.
Ugreen DH2300
| CPU | Intel Celeron N100 quad-core 800MHz (burst 3.4GHz) |
|---|---|
| RAM | 8GB DDR5 (expandable) |
| Bays | 2 × 3.5"/2.5" SATA |
| Network | 2 × 2.5GbE |
| Key backup apps | UGOS Pro Backup |
| AU Price (approx March 2026) | ~$399 |
The Ugreen DH2300 offers impressive hardware for its price. Intel Celeron N100, 8GB DDR5, and 2.5GbE network at approximately the same price as the QNAP TS-233. The hardware is stronger than both the TS-233 and DS225+ at this price point. The constraint is software maturity: UGOS Pro is newer than QTS or DSM, and the backup ecosystem is less developed. The UGOS backup tools handle NAS-to-USB and NAS-to-cloud adequately, but lack the depth of Hyper Backup's versioning and integrity checking, and there is no equivalent to Active Backup for Business for PC protection.
The DH2300 is a strong value pick if you primarily want: RAID 1 protection for NAS data, cloud push to a major provider, and good overall NAS performance. For PC backup as a primary requirement, the DS225+ remains superior despite the hardware disadvantage.
Head-to-Head Comparison
Home Backup NAS Comparison
|
Synology DS225+
|
QNAP TS-233
|
Ugreen DH2300
|
|
|---|---|---|---|
| AU Price (approx) | $599 (PLE Computers) | ~$399 | ~$399 |
| CPU / Architecture | Intel J4125 / x86 | ARM Cortex-A55 | Intel N100 / x86 |
| RAM | 2GB (upgradeable to 6GB) | 2GB fixed | 8GB DDR5 (upgradeable) |
| Network | 2 × 1GbE | 2 × 1GbE | 2 × 2.5GbE |
| PC backup (agentless) | Yes. Active Backup for Business | No. Requires agent install | No |
| Cloud backup | Hyper Backup. Excellent | Hybrid Backup Sync. Good | UGOS Backup. Adequate |
| Mac Time Machine | Yes | Yes | Yes |
| Versioned backup | Yes. Hyper Backup, deep retention | Yes. Hybrid Backup Sync | Basic |
| Snapshot replication | Yes. Btrfs | Yes. QNAP Snapshot Vault | Limited |
| Software maturity | Highest | High | Newer, improving |
| Best for | Multi-PC households, best backup software | Budget NAS-only backup | Performance at entry price, simpler use |
Prices last verified: 19 March 2026. Always check retailer before purchasing.
🇦🇺 Australian Buyers: Where to Buy and Warranty
AU retail availability (March 2026):
- Synology DS225+: Available at Scorptec, PLE, Mwave, Umart, Computer Alliance. 3-year warranty. Local Synology AU support presence
- QNAP TS-233: Available at same major AU retailers. 3-year warranty. QNAP warranty handled via AU distributors
- Ugreen DH2300: Available direct from Ugreen AU online store and select retailers. Warranty through Ugreen AU
Use StaticICE.com.au to compare live pricing across retailers for Synology and QNAP. All three models are covered by Australian Consumer Law guarantees independently of stated warranty periods. Buy from major AU retailers for the most straightforward warranty service path.
See the best NAS Australia guide for a broader model comparison, or the 3-2-1 backup strategy guide for how to structure your backup approach regardless of which NAS you choose.
Related reading: our 3-2-1 backup guide.
Use our free NAS Sizing Wizard to get a personalised NAS recommendation.
Do I need a NAS for home backup if I use cloud storage?
Cloud storage alone is not a complete backup strategy. It is one copy stored offsite. A NAS adds: a local copy for fast restore (restoring 1TB from the cloud takes days; from local NAS, hours), a backup of devices that don't have a cloud backup agent (network printers, smart home devices, server VMs), and control over your data without ongoing storage subscription costs. The ideal home backup combines a NAS for local backup with cloud for offsite. The 3-2-1 model. For households with less than 1TB of important data, cloud alone may be sufficient. For larger or more complex environments, a NAS adds meaningful protection.
How many drives do I need for a backup NAS?
A 2-bay NAS in RAID 1 is sufficient for most home backup use cases. RAID 1 mirrors two drives. If one fails, your data is intact on the second. The trade-off is capacity: you use only half your raw storage (2 × 4TB = 4TB usable in RAID 1). For more capacity with redundancy, a 4-bay NAS in RAID 5 is more efficient (3 drives usable from 4). For a primary backup NAS that is itself the important copy, 2-bay RAID 1 is the pragmatic minimum.
What hard drives should I buy for a backup NAS?
NAS-rated CMR drives: Seagate IronWolf or WD Red Plus. Avoid SMR drives (Seagate Barracuda, some WD Blue models). SMR drives have poor rebuild performance and are not suited for NAS RAID. For a home backup NAS, 4TB or 8TB NAS drives are typically the best cost-per-GB sweet spot in AU. See the NAS hard drive guide for current AU pricing and model recommendations.
Can a NAS back up my iPhone or Android phone?
Yes. Synology and QNAP both provide mobile apps (DS Photo/Moments on Synology, Qfile on QNAP) with automatic photo and video backup from iPhone and Android. Photos upload to the NAS in the background when connected to Wi-Fi. This is separate from PC backup. The mobile app handles phone backup directly. For Android specifically, see the Android photo backup guide for setup steps on both platforms.
Is a backup NAS the same as a NAS RAID?
No. RAID is not a backup. RAID protects against a single drive hardware failure but does not protect against accidental deletion, ransomware, fire/theft, software corruption, or controller failure. A backup NAS is a NAS that runs backup software copying your data to a separate destination (cloud, USB drive, second NAS). RAID on the backup NAS protects the backup storage itself from drive failure. It is one layer of protection, not a replacement for actual backup jobs to separate destinations.
Calculating how much storage your backup NAS needs? The Backup Storage Calculator estimates total required capacity based on your data size, retention period, and change rate.
Backup Storage Calculator →