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Synology

Synology DX525 Drive Enclosure Serial ATA External

$559.43
None availableas of 10/17/2026

Ships when available. Free shipping on most items when you spend $100 or more.

Special orders typically ship in 1-12 weeks.

Compliance and certifications

  • RoHS
Rated excellent by our customers Read our reviews

Secure checkoutISO 9001:2015 and CMMC certifiedFamily owned since 1982

Free shipping on most items when you spend $100 or more.

Real people answer: chat with us, email customerservice@colamco.com, or call 1-800-692-8757, Monday to Friday, 8am to 5pm EST.

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Secure checkoutISO 9001:2015 and CMMC certifiedFamily owned since 1982

Free shipping on most items when you spend $100 or more.

Real people answer: chat with us, email customerservice@colamco.com, or call 1-800-692-8757, Monday to Friday, 8am to 5pm EST.

Overview

Storage expansion without downtime

Easily add five additional drive bays to your Synology DiskStation. The DX525 supports both 2.5" and 3.5" SATA drives and features plug-and-play setup and hot-swap capability for uninterrupted operation during capacity expansion.

Dedicated local backup solution

The Synology DX525 provides a dedicated local backup solution for your Synology DiskStation. When configured as a separate volume, it safeguards data on its local disks in case of system failure.

Online volume expansion

Managed through the host NAS's DiskStation Manager (DSM), the DX525's additional bays are immediately available upon connection. On-the-fly volume expansion ensures uninterrupted service and storage expansion on the host.

Performance backed by Synology drives

Designed for Synology systems, Synology drives deliver consistent performance and unmatched reliability for your deployments.

Hard drives designed for Synology

See how Synology hard drives deliver reliability, consistent performance, and simplified system management through deep hardware-software integration.

Technical specifications

General Information

Manufacturer Synology, Inc
Manufacturer Part Number DX525
Manufacturer Website Address http://www.synology.com
Brand Name Synology
Product Model DX525
Product Name Expansion Unit DX525
Packaged Quantity 1
Product Type Drive Enclosure

Technical Information

Number of Hard Drives Supported 5
Number of Hard Drives Installed 0
Number of Solid State Drive Supported 5
Number of Solid State Drive Installed 0

I/O Expansions

Number of Total Expansion Bays 5
Number of 2.5" / 3.5" Bays 5
Hot Swappable Bays Yes

Network & Communication

Wireless LAN No

Interfaces/Ports

Drive Interface Serial ATA
Number of USB Ports 1

Physical Characteristics

Cooling Fan Yes
Form Factor External
Height 6.5"
Width 9.1"
Depth 8.8"
Weight (Approximate) 5.42 lb

Miscellaneous

Package Contents
  • Expansion Unit DX525
  • 1 x Expansion Cable: USB Type-C
  • 1 x Accessory Pack
  • 1 x AC Power Adapter
  • 1 x AC Power Cord
Environmental Compliance Restriction of Hazardous Substances (RoHS)

Warranty

Limited Warranty 3 Year

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Shipping and returns

Free shipping on most items when you spend $100 or more. In-stock items ship on the next open shipment slot. The buy box above shows the live order-by countdown and the estimated arrival date.

Special order item. This item ships direct from the manufacturer and cannot be cancelled once ordered. If you have any questions before ordering, ask us first: chat with us or call 1-800-692-8757.

Questions about shipping or returns? Chat with us, email customerservice@colamco.com, or call 1-800-692-8757, Monday to Friday, 8am to 5pm EST.