Our Top Picks
Synology DS225+ Private Cloud Media Server165 mm x 108 mm x 232.2 mm9.14 x 4.25 x 6.5 Inches2.9 PoundsCheck on Amazon
BUFFALO LinkStation 210 2TB 1-Bay NAS Network Attached2TB (1x2TB)9.45 x 3.31 x 8.67 inches2.43 poundsCheck on Amazon
The best 2-bay NAS for home backup is the one that keeps two mirrored copies of your files, runs quietly and is simple enough that you will actually keep backups running. For most households that means a diskless 2-bay such as the Synology DS223 or UGREEN DH2300, or a bundled option like the Buffalo LinkStation 220 if you want to skip the drive shopping. Anything more powerful than that is for media streaming and containers rather than backup.
Ten listings follow, two of them single-bay models that are off-type for this keyword; we cover them plainly so you do not mistake them for mirrored systems. Specs below are limited to what each product title states.
Start with the plan, then pick the box
UGREEN NAS DH2300 2-Bay for Beginners & Personal Users, Phone Backup | AI Album, Private Cloud/Remote Access, File Sharing, Multi-Device Backup, Home Entertainment, 4GB RAM on Board (Diskless)
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Synology DS223 Home & Office Backup Hub - Centralize Files, Protect Data & Monitor Property (2-Bay Diskless NAS)
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Synology DS225+ Private Cloud Media Server - Stream, Back Up Photos & Share Files, Intel CPU for Hardware Transcoding (2-Bay Diskless NAS)
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Yxk Zero1 2-Bay NAS for Pesonal & Home Storage, Photo Backup (Diskless) | Docker Support, Private Cloud & File Sharing, Remote Access, Phone Backup, 4GB RAM, 2.5GbE & 4K HDMI
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BUFFALO LinkStation 210 2TB 1-Bay NAS Network Attached Storage with HDD Hard Drives Included NAS Storage that Works as Home Cloud or Network Storage Device for Home
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UGREEN NAS DXP2800 2-Bay for Advanced Home Users, Remote Workers & Creators | Home Media & Data Center, Docker & VM, Plex, Fast File Transfer, Intel N100, 8GB DDR5, 2.5GbE, 2x M.2 NVMe, 4K HDMI(Diskless)
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TERRAMASTER F2-212 2-Bay NAS Quad Core CPU, DDR4 RAM (Diskless) | Personal Private Cloud Home Network Attached Storage, Rich Backup Solutions (Diskless)
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Asustor Drivestor 2 Gen 2 AS1202T 2 Bay NAS Storage for Personal Home Users | Photo File Backup, Remote Access, Mobile App, 4K Media Server, 2.5GbE, Personal Cloud, Network Attached Storage (Diskless)
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Synology DS124 Personal Backup & File Hub - Protect Photos, Secure Home Surveillance (1-Bay Diskless NAS)
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BUFFALO LinkStation 220 4TB 2-Bay NAS Network Attached Storage with HDD Hard Drives Included NAS Storage that Works as Home Cloud or Network Storage Device for Home
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A NAS is storage on your network, not a safety net by itself. The 3-2-1 rule asks for three copies of your data, on two kinds of media, with one copy off-site. A 2-bay NAS gives you a good first layer: your computers back up to it, and the two drives mirror each other. The off-site copy is a cloud service or an external drive kept elsewhere. Pick the NAS after you decide what goes on it, because phone photo backup, a laptop’s full-system backup and a media library push you toward different hardware.
Picks at a glance
| Listing | Bays | Key point from title | Price tier | Best for |
|---|---|---|---|---|
| UGREEN NAS DH2300 | 2 | Beginner, phone backup, 4GB RAM, diskless | Mid-range | First NAS, family photos |
| Synology DS223 | 2 | Home and office backup hub, diskless | Mid-range | Plain, dependable backup |
| Synology DS225+ | 2 | Intel CPU, hardware transcoding | Premium | Backup plus media streaming |
| Yxk Zero1 | 2 | Docker, 2.5GbE, 4K HDMI, 4GB RAM | Budget | Tinkerers on a budget |
| UGREEN NAS DXP2800 | 2 | Intel N100, 8GB DDR5, 2x M.2, 2.5GbE | Premium | Power users, VMs, Plex |
| TERRAMASTER F2-212 | 2 | Quad-core CPU, DDR4, diskless | Budget | Low-cost mirrored backup |
| Asustor Drivestor 2 Gen 2 | 2 | 2.5GbE, 4K media, mobile app | Mid-range | Home users wanting speed |
| BUFFALO LinkStation 220 4TB | 2 | Drives included | Mid-range | Buy-and-plug-in simplicity |
| Synology DS124 | 1 | Single-bay personal backup | Budget | Second copy only |
| BUFFALO LinkStation 210 2TB | 1 | Drive included, home cloud | Budget | Second copy only |
What 2 bays actually give you
| Mode | Usable space with two equal drives | Protects against | Does not protect against |
|---|---|---|---|
| Mirror (RAID 1) | One drive’s worth | One drive failing | Deletion, malware, fire, theft |
| Two separate volumes | Both drives’ capacity | Nothing; a failure loses that volume | Any drive failure |
| Stripe (RAID 0) | Both drives’ capacity, faster | Nothing | Any drive failure loses everything |
For backup, mirror mode is the standard choice. The first two rows show the whole trade-off: capacity or safety. Check that the model you buy offers the mirroring option; the product titles here do not list RAID levels, so confirm it on the listing page.
The ten listings, one by one
UGREEN NAS DH2300 2-Bay
The title pitches the DH2300 at beginners and personal users: phone backup, an AI album, private cloud and remote access, file sharing and multi-device backup, with 4GB of RAM on board and no drives included. The “AI album” label is a seller feature and how well it sorts a photo library is something to check in the manual or buyer reviews. For a household that mainly wants phone photos copied automatically and laptop folders mirrored, this is the pitch it is designed around.
It is not aimed at heavy media transcoding or virtual machines, and the title does not mention network speed, so confirm whether the Ethernet port is gigabit.
Scenario: two parents and two kids, four phones, one family laptop. The goal is that photos leave every phone automatically and land in one place, with the laptop’s Documents folder copied nightly. A beginner-oriented box fits that pattern because setup is the hard part, not performance. Plan for two 4TB drives in mirror mode, which the sizing example below shows is comfortable for years of photos.
- Pros: beginner-focused feature list; phone backup and remote access named; mid-range price tier.
- Cons: no drives included; network port speed not stated in the title; AI album claims need verification.
Question before buying: does the mobile app automatically upload new photos, and can it exclude folders?
Synology DS223 Home & Office Backup Hub
The DS223 is a 2-bay diskless NAS marketed for centralizing files, protecting data and monitoring property, which suggests surveillance-camera features you should confirm on the product page. Titles in this brand family stay modest on hardware detail, so this listing tells you the bay count and that it ships without drives, and little else. What buyers generally weigh with Synology is software polish and update history rather than raw specifications, which is something to check in current buyer reviews.
Scenario: a home office with two computers that need scheduled backups and a shared folder for scanned paperwork. Because the title is modest about hardware, what you are paying for is the vendor’s software and long-term update pattern. If that is the deciding factor, read the current support and update policy on the maker’s site before choosing this over a cheaper unit.
- Pros: clear backup positioning; 2 bays; diskless so you choose the drives.
- Cons: title lists no CPU, RAM or network speed; mid-range pricing for modest hardware.
Question before buying: what drive compatibility list does the manufacturer publish for this model?
Synology DS225+ Private Cloud Media Server
The DS225+ adds an Intel CPU “for hardware transcoding” to the 2-bay formula, which points toward media streaming alongside backup. If you plan to stream video to phones and TVs and also back up family files, that is the reason to pay the premium over the DS223. If you only back up documents and photos, the extra hardware is cost you may not use.
Because the title mentions transcoding but not specific supported codecs, confirm the formats you care about on the manufacturer’s page.
Scenario: a family with a shared video library who also wants everything backed up. Hardware transcoding helps when a TV or phone cannot play a file’s original format, converting it on the fly. If everyone plays files directly, you will rarely use that feature. In that case the premium is better spent on larger drives or an off-site copy.
- Pros: Intel CPU for transcoding; photo backup and file sharing; 2 bays.
- Cons: premium price tier; no drives; transcoding benefits do not apply to backup-only use.
Question before buying: do you actually stream video from the NAS, or only back up?
Yxk Zero1 2-Bay NAS
The cheapest 2-bay here lists Docker support, a private cloud, remote access, phone backup, 4GB RAM, 2.5GbE and a 4K HDMI output, with no drives. The title contains a typo (“Pesonal”), and Yxk is a brand with little visible track record, so treat this as a risk-reward pick. Software support and firmware updates matter more for a device holding your only copy of family photos, and a title cannot tell you that.
Scenario: a hobbyist who wants a low-cost box for Docker experiments and a second copy of files, with the real backup kept elsewhere. Used that way, a failure is an annoyance, not a disaster. Used as the only copy of a wedding photo archive, it is a gamble given how little the title tells you about firmware support and how the device handles drive health alerts.
- Pros: lowest price tier; 2.5GbE and HDMI on paper; Docker mentioned.
- Cons: unfamiliar brand; typo in the listing; update policy unknown; best kept as a secondary copy until its track record is clear.
Question before buying: how long has the seller shipped firmware updates, and what is the warranty?
UGREEN NAS DXP2800 2-Bay
The DXP2800 is the power-user machine in this set: an Intel N100, 8GB of DDR5, 2.5GbE, two M.2 NVMe slots, a 4K HDMI output, and support for Docker, VMs and Plex per the title. The M.2 slots can be used for caching or fast storage; check the product page for how they are intended to be used. For backup alone this is overbuilt, but if you want one box for backups, a media server and small containers, it is the strongest listing here.
Scenario: a remote worker who wants backups, a Plex library, a few containers and perhaps a small virtual machine on one device, with a fast NVMe pool for working files. The two M.2 slots and 8GB of DDR5 suit that. The cost is complexity: more settings, more updates and more things that can be misconfigured, so budget time for setup and for checking backup jobs afterward.
- Pros: 8GB DDR5; 2.5GbE; two M.2 slots; strong media and container story.
- Cons: premium price tier; more to configure than a beginner box; drives not included.
Question before buying: will you really run VMs, or is a simpler model enough?
TERRAMASTER F2-212 2-Bay NAS
The F2-212 lists a quad-core CPU and DDR4 RAM, diskless, with a rich-backup pitch. It sits at the budget end of the established-brand options and gives you the mirror setup without much else. The title does not give RAM size or network speed, so verify both. It suits someone who wants a simple second home for files without paying for transcoding or app stores.
Scenario: a retiree or small household that wants a mirrored place for documents and photos and does not care about apps or streaming. The price tier fits, and the quad-core CPU is adequate for file serving. The unknowns are RAM size and the Ethernet speed, so make sure the listing or manufacturer page answers both before you commit.
- Pros: budget tier; quad-core CPU; 2 bays.
- Cons: RAM and port speed not stated; fewer polish and app features implied than the premium models.
Question before buying: what operating system and mobile app does it ship with?
Asustor Drivestor 2 Gen 2 AS1202T
Asustor’s AS1202T targets personal home users: photo and file backup, remote access, a mobile app, a 4K media server and 2.5GbE. It sits in the middle of the price range and is a reasonable alternative to the DH2300 if you want a faster network port. The title lists 2.5GbE, so the benefit shows up only if your router or computer also supports it.
Scenario: a photographer or video hobbyist who moves large files between a desktop with a 2.5GbE port and the NAS. On that setup the faster port shortens big transfers noticeably. For a household that only does phone backups over Wi-Fi, 2.5GbE is irrelevant, and a cheaper gigabit unit does the same job.
- Pros: 2.5GbE; mobile app; media server mentioned; 2 bays.
- Cons: RAM and CPU not in the title; no drives; speed gains need compatible gear.
Question before buying: does your router have a 2.5GbE port?
BUFFALO LinkStation 220 4TB 2-Bay
This is the only drive-included 2-bay here: 4TB total, sold with HDDs in place as a home cloud or network storage device. That simplifies setup, which suits buyers who do not want to research drive models. The catch is that the title says 4TB and not how the two drives are arranged; if 4TB is the combined raw capacity, mirrored usable space is about half, so check the listing.
Scenario: a non-technical buyer who wants to unbox a device, plug it in and have storage on the network without researching drives. The included drives remove the compatibility question. The cost of that convenience is that the NAS cannot grow with you: when 4TB fills, you replace drives, not add to them, and the drive model was chosen by the vendor.
- Pros: drives included; simple home-cloud pitch; 2 bays.
- Cons: fixed drive choice; usable capacity depends on mirror mode; limited media features implied.
Question before buying: is the 4TB total or per drive, and is RAID 1 supported?
Synology DS124 (1-Bay)
The DS124 is an off-type listing for this keyword: a single-bay diskless NAS aimed at personal backup and home surveillance. With one drive there is no mirroring. It is a fine second copy of data you already keep elsewhere, or a low-cost remote target at a relative’s house, but it should not be your only backup.
Scenario: a second copy at a relative’s house, receiving a nightly sync of your most important folders over the internet. In that role a single bay is acceptable because the primary mirror lives at your home. Without that main copy elsewhere, one failed drive means the data is gone.
- Pros: budget tier; established brand; simple.
- Cons: one bay and no redundancy; not a primary backup solution.
Question before buying: where is the second copy of this data?
BUFFALO LinkStation 210 2TB (1-Bay)
Another single-bay listing, with a 2TB drive included, positioned as a home cloud. It is off-type here for the same reason: no mirroring. It suits someone who just wants one inexpensive network drive for a small file collection, and who will back it up elsewhere.
Scenario: a small shared folder for a household that mostly streams and rarely stores much, with the genuinely important files in a cloud account. As a secondary home for documents it is acceptable. As the backup for a growing photo library it is too small and too exposed.
- Pros: drive included; low price tier.
- Cons: single drive, no redundancy; limited capacity; older hardware class implied by the model name.
Question before buying: will 2TB cover your files two years from now?
Which box for which household
| Household pattern | What you need | Good fits here | Skip |
|---|---|---|---|
| Phones and family photos only | Auto upload, mirror, simple app | UGREEN DH2300, Synology DS223 | 1-bay models as the only copy |
| Laptops plus shared documents | Scheduled backup, user accounts | Synology DS223, TERRAMASTER F2-212 | Overbuilt DXP2800 |
| Backup plus video streaming | Transcoding or fast CPU | Synology DS225+, UGREEN DXP2800 | Entry units with 4GB RAM |
| Large file transfers | 2.5GbE on both ends | Asustor AS1202T, DXP2800 | Gigabit-only setups |
| No interest in setup | Drives included | Buffalo LinkStation 220 | Plans to grow beyond 4TB |
Worked example: sizing and backup time
Assumptions: a household has 1.4TB of photos and documents today and adds about 250GB a year. The plan is a mirrored pair, three years of growth and a 30 percent buffer.
| Step | Calculation | Result |
|---|---|---|
| Data today | Given | 1.4TB |
| Growth over three years | 250GB x 3 | 0.75TB |
| Subtotal | 1.4 + 0.75 | 2.15TB |
| With 30 percent buffer | 2.15 x 1.3 | About 2.8TB usable |
| Drive size for a mirror | Each drive gives usable space | Two 4TB drives |
| First-copy time on gigabit (about 110MB/s) | 1.4TB / 110MB/s | Roughly 3.5 to 4 hours |
The sizing shows why the LinkStation 220’s 4TB total would be tight if it means two 2TB drives mirrored: usable space would be about 2TB, below the 2.8TB target. The time line shows 2.5GbE saves hours on the first copy only; nightly incremental backups finish quickly on gigabit.
Drives and the 3-2-1 layout
Choose NAS-rated drives for diskless models, preferably CMR rather than SMR, and avoid buying both from the same batch if you can. Our NAS drive picks by bay count and capacity covers options. A sample layout: computers back up to the NAS nightly (copy one, medium one), the NAS mirrors its two drives (copy two), and an external drive or cloud target holds the third copy off-site. Network quality matters too, so see routers with the ports NAS owners need. If your plans expand into streaming, multi-bay media-server NAS options go further.
| Copy | Where it lives | Medium | Failure it covers |
|---|---|---|---|
| 1 (working data) | Your computer or phone | Internal drive | Day-to-day use |
| 2 (local backup) | The 2-bay NAS, mirrored | Two NAS drives | A single drive or computer failure |
| 3 (off-site) | Cloud service or a drive at another address | Different medium | Fire, theft, flood, ransomware on the home network |
Verification checklist
- Run a test restore of a few files each month and confirm they open.
- Check drive health alerts and email notifications are enabled.
- Keep NAS firmware updated and do not expose it directly to the internet.
- Use a separate account for each user and enable two-step verification where offered.
- Place the NAS where it has airflow and, ideally, a surge-protected outlet or UPS; follow the manufacturer’s instructions.
How we picked these
This roundup uses listing titles, published specifications, manufacturer documentation and patterns in buyer reviews. Nobody on the team used or measured these units. Where a title is silent on CPU, RAM or port speed we say so rather than guess.
Mistakes buyers make
- Treating mirroring as a complete backup.
- Buying a 1-bay unit as a primary backup.
- Choosing 2.5GbE without 2.5GbE gear on the network.
- Buying SMR or cheap desktop drives for a NAS.
- Skipping restore checks until a drive fails.
Verdict by use case
Simple, first NAS: UGREEN DH2300 or Synology DS223. Backup plus streaming: Synology DS225+ or UGREEN DXP2800. Lowest cost mirror: TERRAMASTER F2-212. Faster network: Asustor AS1202T. No drive shopping: Buffalo LinkStation 220. Keep the Yxk Zero1 as a secondary copy until you are comfortable with its support, and the two 1-bay models as extra copies only.
Frequently asked questions
Is a 2-bay NAS enough for home backup?
Yes for most households. Two bays let you mirror two drives so one failure does not erase your files, and a household’s photos, documents and phone backups usually fit in a few terabytes. A NAS alone is still not a complete backup, though. Add a second copy somewhere else, such as an external drive stored off-site or a cloud copy, to follow the 3-2-1 rule.
Does RAID 1 protect me from deleting files by accident?
No. Mirroring copies every change to both drives, including deletions, overwrites and ransomware encryption. It protects against one drive dying, not against human error or malware. For that you need versioned backups or snapshots if the NAS supports them, plus a separate copy that is disconnected or on another device. Check each listing for snapshot or versioning features before relying on it.
Should I buy a NAS with drives included or diskless?
Diskless models let you choose NAS-rated drives, buy different capacities, and stagger purchase dates to avoid both drives wearing out together. Bundles such as the Buffalo LinkStation 220 save the shopping step but fix the capacity and drive model. If you go diskless, budget for two drives and pick NAS-rated, CMR models rather than the cheapest desktop drives.
Do I need 2.5GbE for home backup?
Not strictly. Gigabit Ethernet moves roughly 110MB/s in practice, which is plenty for nightly incremental backups. 2.5GbE helps with the first large copy and with large video files, but only if your router, switch or computer also supports it. If you only have gigabit gear, the extra speed sits unused, so check your own network first.
What is wrong with a 1-bay NAS for backup?
A single bay has no mirroring, so one drive failure can mean losing the only copy on that device. It can work as a second copy of data you already keep elsewhere, which is how a 1-bay box such as the Synology DS124 or Buffalo LinkStation 210 is best used. For a primary home backup, a 2-bay model with two drives is the safer minimum.
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