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  • Synology 5-Bay DiskStation DS1525+ (Diskless)

Synology 5-Bay DiskStation DS1525+ (Diskless)

4.0 out of 5 stars (39)
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About this item

  • **Please Note: The DS1525+ only supports drives on the model's official compatibility list. Drives not listed as compatible may have functionality limitations.
  • Up to 1,181/1,180 MB/s sequential read/write throughput supports stable data transfers
  • Built-in 2.5GbE ports for fast connectivity out of the box with support for 10GbE
  • Add 10 extra drive bays for up to 300 TB of raw storage with two DX525 expansion unit
  • Backed by Synology's 3-year limited hardware warranty
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Product description

Synology DS1525+ is a versatile 5-bay storage solution that scales with your needs, with support for storage expansion, 10GbE networking, and SSD caching. Built-in 2.5GbE networking provides excellent networking performance out of the box. Powered by Synology DiskStation Manager (DSM), this device is a flexible all-in-one solution for data sharing, synchronization, backup, and surveillance.

Product details

  • Language ‏ : ‎ English, English, English, English, English
  • Product Dimensions ‏ : ‎ 22.3 x 23.01 x 16.61 cm; 2.67 kg
  • Manufacturer ‏ : ‎ Synology
  • ASIN ‏ : ‎ B0C8S6ZZVX
  • Item model number ‏ : ‎ DS1525+
  • Customer Reviews:
    4.0 out of 5 stars (39)

Product information

Technical Details

Summary
Brand ‎Synology
Item model number ‎DS1525+
Product Dimensions ‎22.3 x 23.01 x 16.61 cm; 2.67 kg
Item dimensions L x W x H ‎22.3 x 23 x 16.6 Centimetres
Colour ‎Black

Additional Information

ASIN B0C8S6ZZVX
Customer Reviews
4.0 out of 5 stars (39)

4.0 out of 5 stars
鶹 Rank
Date First Available June 4 2025
Manufacturer Synology

Warranty & Support

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Synology 5-Bay DiskStation DS1525+ (Diskless)

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From the manufacturer

Synology 25 Plus Series NAS ranging from 2 to 8 bay, scalable to 18 bay epansion units (DX525)
Backuup for Creators

Powerful performance for modern workflows

Powered by a quad-core AMD Ryzen V1500B processor and 8 GB of ECC memory (expandable to 32 GB), the DS1525+ delivers up to 1,181 MB/s read and 1,180 MB/s write throughput. With the optional 10GbE upgrade card, plus support for both M.2 NVMe and 2.5” SATA SSDs, external hard drives and third-party cloud services quickly become obsolete.

Optimized for every stage of your creative process

Automatic ingestion – Import new files directly from USB into an all-flash pool using SNV5400 or SNV3400 enterprise NVMe SSDs. Utilize the NAS to store high resolution images and videos and generate proxy files for faster edits in the tool of your choice.

Editing performance – Collaborate on projects stored on SAT5200 enterprise SATA SSDs; with 10GbE networking, multiple editors can work without bottlenecks.

Seamless archiving – Offload completed work to a high-capacity HDD pool on a DX525 expansion unit, automatically building a long-term archive of your portfolio.

Triple the expandability

Scale your storage to 15 drives with up to two DX525 expansion units. Synology’s on-the-fly volume expansion and hot-swappable bays allow you to grow without downtime, ensuring continuous availability for mission-critical work.

Better together: multi-unit advantages

Adding a second Synology NAS multiplies value by improving redundancy, enabling collaboration, and unlocking enterprise-grade flexibility:

  • Two-way file synchronization between remote teams
  • Off-site backup for disaster recovery
  • Hybrid cloud expansion for scalable workloads
  • Multi-site surveillance deployments with centralized management

  • Quad-core AMD Ryzen CPU with ECC memory for stability
  • Up to 32 GB ECC memory for demanding workloads
  • Up to 1,181 MB/s read / 1,180 MB/s write throughput
  • 2 x M.2 NVMe SSD slots for caching or dedicated storage pools
  • Built-in tools for file sync, sharing, and collaboration
  • Snapshot and backup protection against ransomware
  • Network upgrade slot supporting optional 10GbE

Why choose the 25+ Series?

DSM operating system for Synology NAS

Unified, intuitive data management

Every 25 Plus series NAS runs the latest version of Synology DSM, delivering seamless file storage, sharing, device backup and multimedia management. Standard features include fast setup, system-wide search and remote access on all models, from compact 2-bay units to scalable 18-bay systems with raw capacities ranging from 40 TB to 360 TB.

DS225+ 2-bay solutions

Flexible management and expansion

Even compact models like the DS225+ support sizable volumes for home or office and can scale seamlessly into a hybrid cloud. Larger units such as the DS1825+ add ECC RAM, NVMe SSD caching and support for high-end upgrades, while all models include essentials like dual USB-A ports, hot-swappable drives and tool-less trays.

2.5 GbE Standard

Improved networking across the lineup

Every 25 Plus series system includes at least one 2.5GbE port, providing faster transfers than previous generations. Five- and eight-bay models feature dual 2.5GbE, SMB3 Multichannel and PCIe slots for 10/25GbE adapters, eliminating gigabit bottlenecks across the range.

DS225+ 2-bay solutions

Full suite of apps and security at any size

From two-bay setups to fully scaled 18-bay systems, the 25 Plus series gives you full access to the DSM app library, including file syncing, surveillance, virtualization, cloud backup and media streaming. All models support backup, versioning, device management and multi-factor authentication to keep data secure at any scale.

Desktop NAS with Synology drives

Synology hard drives offer proven reliability and compatibility, achieved through a comprehensive testing regimen on Synology devices, spanning over 1,000 stress test cycles and 500,000+ hours.

Network Attached Storage | Synology
What can I do with Synology?
  • Back up PCs, Macs and mobile devices
  • Stream photos, videos and music
  • Access and share files securely
  • Replace cloud services such as Dropbox
  • Run Docker and virtual machines
  • Collaborate on files in real-time
  • Synchronize files and folders between Synology NAS devices
  • Use immutable snapshots to create permenant, point-in-time system backups

Dedicated to security and data protection

Network Attached Storage (NAS) provides a centralized location on a network to store data. Synology NAS goes beyond that, enabling you to build your own private cloud eliminating vulnerabilities associated with the internet or public cloud.

Our Product Security Incident Response Team (PSIRT) provides 24-hour response to vulnerabilities, ensuring rapid patches when threats emerge. We employ top security researchers through our Bug Bounty Program and lead community events such as Pwn2Own.

  • Encrypt files, folders and volumes with to keep personal data inaccessible, even if the NAS is stolen
  • Encrypt files, folders and volumes with to keep personal data inaccessible, even if the NAS is stolen
  • Create firewall rules, automatically block IP addresses with too many failed login attempts
  • Enable 2FA or choose from a range of passwordless login methods such as USB logins, Windows Hello or Apple Touch ID
  • Enable NAS-to-NAS backups from your primary NAS to an off-site Synology NAS on a schedule with Synology Hyper Backup
  • Complete the 3-2-1 backup strategy to ensure your data is accessible in any case
DS225+.
DS725+
DS425
DS925+
DS1525+
DS1825+
CPU Model Intel Celeron J4125 AMD Ryzen R1600 Intel Celeron J4125 AMD Ryzen V1500B AMD Ryzen V1500B AMD Ryzen V1500B
System Memory 2 GB DDR4 non-ECC 4 GB DDR4 ECC SODIMM 2 GB DDR4 non-ECC 4 GB DDR4 ECC SODIMM 8 GB DDR4 ECC SODIMM 8 GB DDR4 ECC SODIMM
Maximum Memory Capacity 6 GB (2 GB + 4 GB) 6 GB (2 GBa32 GB (16 GB x 2) + 4 GB) 6 GB (2 GB + 4 GB) 32 GB (16 GB x 2) 32 GB (16 GB x 2) 32 GB (16 GB x 2)
RJ-45 1GbE LAN Port 1 1 1 no data no data no data
RJ-45 2.5GbE LAN Port 1 1 1 2 2 2
USB-C Expansion Port no data 1 no data 1 2 2
PCIe Expansion (10/25GBE) no data no data no data no data 1 x Gen3 x2 network upgrade slot 1 x Gen3 x8 slot (x4 link)
M.2 NVMe slots no data 2 2 2 2 2
Suggested max cameras@FPS (H.264) 1080p: 25@750, 5MP: 25 @ 280, 4K: 17 @ 170 1080p: 40@800, 5MP: 28@280, 4K: 17@170 1080p: 40@800, 5MP: 28 @ 280, 4K: 17 @ 170 1080p: 40@1050, 5MP: 30@ 360, 4K: 20 @ 200 1080p: 40@1050, 5MP: 30 @ 360, 4K: 20 @ 200 1080p: 40@ 1050, 5MP: 30 @ 360, 4K: 20 @ 200
Suggested max cameras@FPS (H.265) 1080p: 25@750, 5MP: 25 @ 480, 4K: 20 @ 200 1080p: 40@1200, 5MP: 40 @ 480, 4K: 20 @ 200 1080p: 40@1200, 5MP: 40 @ 480, 4K: 20 @ 200 1080p: 40@1200, 5MP: 40 @ 600, 4K: 30 @ 300 1080p: 40@1200, 5MP: 40 @ 600, 4K: 30 @ 300 1080p: 40@1200, 5MP: 40 @ 600, 4K: 30@300

Top Brand: Synology

Highly Rated
50K+ customers rate items from this brand highly
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1K+ orders for this brand in past 3 months
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Customer reviews

4 out of 5 stars
39 global ratings

Customers say

Customers find this system cabinet to be a good NAS that works as advertised and runs flawlessly. They appreciate that it's easier to set up and can take all the configurations and data. However, customers have mixed opinions on compatibility.
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8 customers mention quality, 7 positive, 1 negative
Customers appreciate the quality of this system cabinet. They describe it as a great NAS and quality product. Users find it to be a great full-featured NAS and consider it a great next gen hardware upgrade.
5 customers mention functionality, 4 positive, 1 negative
The system cabinet works as advertised and runs flawlessly with good work quality. Customers report no issues at all with its functionality.
5 customers mention setup, 4 positive, 1 negative
Customers find the system cabinet easier to set up and report that all configurations and data went smoothly during installation.
Couldn't start installation with a functional, third party NAS drive....Read more
7 customers mention compatibility, 4 positive, 3 negative
Customers have mixed experiences with the system cabinet's compatibility. Some find it works with any third party drive and allows 3rd party hdds to be used without limitations, while others report limited Apple MacOS support and that Synology won't let you expand. The cabinet works OK with SMB, though some mention being able to populate it with unsupported drives.

Top reviews from Canada

  • Karl-Heinz Müller
    1.0 out of 5 stars Couldn't start installation with a functional, third party NAS drive.
    Reviewed in Canada on July 3, 2025
    Verified Purchase
    Please update this: "The DS1525+ only supports drives on the model's official compatibility list. Drives not listed as compatible may have functionality limitations." to the "DS1525+ requires a Synology drive to setup"

    If you buy this add a Synology drive.
    8 people found this helpful
    Helpful
     Report
  • cdp
    1.0 out of 5 stars Stay away unless you absolutely have to have a Synology system
    Reviewed in Canada on January 31, 2026
    I own an older DS1522 5 bay Synology NAS and love it. Additionally I own a really old DROBO that finally decided to die. It too was a 5 bay NAS that I had populated with Western Digital RED drives... all five the exact same 4TB model. So I thought it would be a simple solution to buy another Synology NAS and populate it with my WD drives, as they're a significant investment in their own right. Should work, since 3rd party drives work just fine in my DS1522, right?

    Wrong! Synology has set up all their new NAS appliances such that they will only work with their proprietary Synology hard drives, which, guess what? Cost significantly more than Western Digital or other 3rd party equivalent drives. I can't support predatory and monopolistsic practices like that, and as such I'll never buy another Synology product in the future. If for some reason you must have Synology equipment, you've been forwarned... otherwise I recommend that you avoid them like the plague. The only way to teach manufacturers that they've made a poor engineering and marketing decision is to vote with your wallet.
    Helpful
     Report
  • Sam
    1.0 out of 5 stars Only accepts Synology Drives!!!
    Reviewed in Canada on December 12, 2025
    Only accepts Synology drives. deal breaker
    2 people found this helpful
    Helpful
     Report

Top reviews from other countries

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  • Chao Chen
    5.0 out of 5 stars Work quality good
    Reviewed in Australia on February 16, 2026
    Verified Purchase
    Good quality
    Report
  • 鶹 Customer
    5.0 out of 5 stars Great Synology NAS
    Reviewed in the United Kingdom on February 24, 2026
    Verified Purchase
    I've had this DS1525+ Synology for nearly a month. It's been great. Easy to setup (although in my opinion, you need a little IT knowledge). Highly recommend.
    Report
  • Santiago Prado
    5.0 out of 5 stars Muy recomendado para estudio creativo
    Reviewed in Mexico on March 14, 2026
    Verified Purchase
    Synology es calidad. Lo tengo instalado en una oficina con 20 creativos conectados a ethernet 2.5gbe, sin problema.

    Abren archivos Photoshop directo del NAS con velocidad muy decente.
    Report
  • JT San Filippo
    5.0 out of 5 stars Great NAS with long awaited 2.5gbe update
    Reviewed in the United States on July 28, 2025
    Verified Purchase
    People are negatively reviewing this product because they haven’t done any research before purchasing.

    Yes - it is true that you must use Synology HDDs, as has been widely reported and publicly announced by Synology. However, I was able to get Synology Plus 16TB HDDs for $300 so I am not too upset that I had to use their HDDs. If it helps Synology better support/service their product, I’ll stick with their drives as long as they as similarly priced and spec’d (which in this case, they are).

    Other than that, this is a great NAS. Stock CPU and RAM is more than enough for my use. 2x2.5gbe is welcome, plus the ability to upgrade to 10gbe.

    Device is well built - similar to its predecessors. And quieter than I expected.

    Honestly, I am happy with this as my first NAS.
    Report
  • Mr. E. Manne
    1.0 out of 5 stars Synology thinks they are the new NetApp ... lol
    Reviewed in the United States on July 24, 2025
    Verified Purchase
    Good-bye, Synology. It's been a nice decade+ run. Never going to trust you, again, however. If I need to pay this much just to have a small NAS, then I'll find a used NetApp or something. I feel physically ill, like I am getting a divorce, or something. I LOVED you, maaaaan.

    If you are thinking that you can get this stupid thing, populate it with unsupported drives, then use the supported drive database hack, forget it. You will not even be able to boot it up past the attached screen to install DSM and be able to enable sshd so that you can apply those. It comes pre-bricked for you, in other words.

    I can buy a used NetApp (the biggest name in enterprise level NAS) for much cheaper. Ridiculous.
    Customer image
    Mr. E. Manne
    1.0 out of 5 stars
    Synology thinks they are the new NetApp ... lol

    Reviewed in the United States on July 24, 2025
    Good-bye, Synology. It's been a nice decade+ run. Never going to trust you, again, however. If I need to pay this much just to have a small NAS, then I'll find a used NetApp or something. I feel physically ill, like I am getting a divorce, or something. I LOVED you, maaaaan.

    If you are thinking that you can get this stupid thing, populate it with unsupported drives, then use the supported drive database hack, forget it. You will not even be able to boot it up past the attached screen to install DSM and be able to enable sshd so that you can apply those. It comes pre-bricked for you, in other words.

    I can buy a used NetApp (the biggest name in enterprise level NAS) for much cheaper. Ridiculous.
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