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- Internal Power Cables
- Processors - Desktops
- Processors - Servers
- Processors - Mobile
- CPU Fans & Heatsinks
- Thermal Compound / Grease
- Water / Liquid Cooling
- DIY Cooling
- Desktop Memory
- Laptop Memory
- Mac Memory
- Server Memory
- System Specific Memory
- Memory Cards
- USB Flash Drives
- AMD Motherboards
- Intel Motherboards
- Embedded Solutions
- Server Motherboards
- Development Boards
- Motherboard Accessories
- Add-On Cards
- CPU Fans & Heatsinks
- Internal Power Cables

Synology DX525, 5 Bay NAS, Expansion Unit, 3.5" Diskless Exp...
$880.99
Synology DX525, 5 Bay NAS, Expansion Unit, 3.5" Diskless Expansion
$880.99
In Supplier Stock
Freight Calculator
- •Brand: Synology
- •Warranty: 3 Year
- •Model: 99X373211
Need Help or Found it Cheaper?
Chat with our experts for product advice or price matching on genuine written quotes.
- 25 series:DS1825+, DS1525+, DS925+, DS725+
- 3.5" SATA HDD
- 2.5" SATA SSD
- FCC
- CE
- BSMI
- UKCA
- EAC
- VCCI
- RCM
- KC
- BIS
- Availability varies by region. Before purchasing, please visit the official web pages of EW201/202 and Extended Warranty Plus for a list of eligible regions.
- The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
- Main Unit X 1
- Expansion Cable: USB Type-C X1
- Accessory Pack X 1
- AC Power Adapter X 1
- AC Power Cord X 1
- Enterprise Series 3.5" SATA HDD: HAT5300 Series
- Plus Series 3.5" SATA HDD: HAT3300 Series
- Enterprise Series 2.5" SATA SSD: SAT5200 Series
|
||
---|---|---|
Applied Models
|
Supports creating volumes across different units |
|
Notes | To have better performance, we recommend creating storage volumes physically located within the same NAS or Expansion Unit, rather than creating volumes across your NAS and Expansion Unit. | |
Storage
|
Drive Bays | 5 |
Drive Type (See all supported drives) |
|
|
Hot Swappable Drive* | ||
RAID Management through Synology DSM | ||
Notes | Compatible drives are mandatory. Please consult our compatibility list before purchasing hard drives. For more details, please refer to this article. | |
External Ports
|
Expansion Port | 1 |
Appearance
|
Size (Height x Width x Depth) | 166 mm x 230 mm x 223 mm |
Weight | 2.46 kg | |
Power
|
Power Recovery | Synchronized with the Synology DiskStation |
Power Supply Unit / Adapter | 90 W | |
AC Input Power Voltage | 100V to 240V AC | |
Power Frequency | 50/60 Hz, Single Phase | |
Power Consumption* | 35.37 W (Access) 7.0 W (HDD Hibernation) |
|
British Thermal Unit | 120.69 BTU/hr (Access) 24.02 BTU/hr (HDD Hibernation) |
|
Notes | For more information on how power consumption is measured, refer to this article. | |
Temperature
|
Operating Temperature | 0°C to 40°C (32°F to 104°F) |
Storage Temperature | -20°C to 60°C (-5°F to 140°F) | |
Operating humidity | 8% to 80% RH | |
Storage Humidity | 5% to 95% RH | |
Others
|
System Fan | 92 mm x 92 mm x 2 pcs |
Noise Level* | 20.4 dB(A) | |
Notes | Noise testing was conducted with the Synology system fully installed with Synology SATA HDDs and in an idle state. Two G.R.A.S. Type 40AE microphones are placed at a 1 m distance from the front and rear of the device. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8% | |
Certification
|
|
|
Warranty
|
3-year hardware warranty, extendable to 5 years with EW201 | |
Notes |
|
|
Environment & Packaging
|
||
Environment
|
RoHS Compliant | |
Packaging Content
|
|
|
Optional Accessories
|
|
What are my payment methods
• Bank Transfer - No Fees
• Credit Cards - VISA, MasterCard 1.5% Handling Fee
• PayPal - 2.75% Handling Fee
Bank Transfer
In order to pay for your order by bank transfer, you must first complete the
checkout process as normal. Upon completion you will be issued with an invoice
for your order which will be processed once your payment clears. From here you
may log onto your internet banking and make a payment for the order amount to
the bank account listed below. Alternatively, you may visit your local branch,
fill out a Deposit Slip with the correct details using the information below
and process this transfer with the bank teller in person.
Bank: Westpac Banking
Corporation
Account Name: ZCOMPUTE PTY LTD.
BSB: 034108
Account Number: 606317
Please add your invoice number and name in the description area when placing your deposit. If you do not have the relevant details on hand, or are unable to add the description, please email or fax through a copy of your deposit receipt as soon as possible. Please note that your order will not be processed until the funds have successfully deposited into our bank account and the payment has been confirmed as received by our accounts department. This process takes 1 - 5 business days.
Credit Card
Zotim accepts all major credit cards - Visa,
Master Card and Debit Cards. Please note, credit card handling fees do apply as
follows: VISA/MasterCard at 1.5%. These fees are comprised of Merchant Service
fees, Terminals fees, fraud prevention costs that cannot absorb due to the
extremely lower than retail prices we offer.
Please note: Due to the rise of credit card fraud
and for your security all credit card orders will be subject to advanced
security checks. If your order does not meet our security check requirements,
you will be contacted and further credit card security procedures will be
implemented.
Shipping
We prefer to use couriers for shipping which include Couriers Please. Startrack and Toll Express.
The courier require a signature on delivery so please give a delivery address where someone will be available to sign for the parcel.
We can use Australia Post as well, however parcels sent through Australia Post are not insured for loss or damage.
How is shipping cost calculated?Shopping at zotim.com.au is all about how much you can save with our shipping methods. As a brief summary - if you buy more than 1 item, your shipping cost for the 2nd, 3rd & subsequent items will be less than the first item!
We can afford this mainly because the cost of the delivery driver travelling to your address is already covered by the first parcel delivery charge, so the remaining parcels are only charged by the additional weight.
Note that we aren't always able to add items to orders after the order is placed, so be sure to order everything you want in one go when you first checkout, to ensure the quickest possible processing of your order, and the lowest possible shipping cost. We also aren't able to merge orders - the above images show what is possible if all items from Order 1 and 2 are ordered on a single order, it does not infer that we can combine multiple orders (our system is unable to accommodate this at this time).
Flat Shipping Fee $14.99
Synology DX525, 5 Bay NAS, Expansion Unit, 3.5" Diskless Expansion
- •Brand: Synology
- •Warranty: 3 Year
- •Model: 99X373211
Need Help or Found it Cheaper?
Chat with our experts for product advice or price matching on genuine written quotes.
Sold by: Zotim
$880.99
In Supplier Stock
Freight Calculator
- 25 series:DS1825+, DS1525+, DS925+, DS725+
- 3.5" SATA HDD
- 2.5" SATA SSD
- FCC
- CE
- BSMI
- UKCA
- EAC
- VCCI
- RCM
- KC
- BIS
- Availability varies by region. Before purchasing, please visit the official web pages of EW201/202 and Extended Warranty Plus for a list of eligible regions.
- The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
- Main Unit X 1
- Expansion Cable: USB Type-C X1
- Accessory Pack X 1
- AC Power Adapter X 1
- AC Power Cord X 1
- Enterprise Series 3.5" SATA HDD: HAT5300 Series
- Plus Series 3.5" SATA HDD: HAT3300 Series
- Enterprise Series 2.5" SATA SSD: SAT5200 Series
|
||
---|---|---|
Applied Models
|
Supports creating volumes across different units |
|
Notes | To have better performance, we recommend creating storage volumes physically located within the same NAS or Expansion Unit, rather than creating volumes across your NAS and Expansion Unit. | |
Storage
|
Drive Bays | 5 |
Drive Type (See all supported drives) |
|
|
Hot Swappable Drive* | ||
RAID Management through Synology DSM | ||
Notes | Compatible drives are mandatory. Please consult our compatibility list before purchasing hard drives. For more details, please refer to this article. | |
External Ports
|
Expansion Port | 1 |
Appearance
|
Size (Height x Width x Depth) | 166 mm x 230 mm x 223 mm |
Weight | 2.46 kg | |
Power
|
Power Recovery | Synchronized with the Synology DiskStation |
Power Supply Unit / Adapter | 90 W | |
AC Input Power Voltage | 100V to 240V AC | |
Power Frequency | 50/60 Hz, Single Phase | |
Power Consumption* | 35.37 W (Access) 7.0 W (HDD Hibernation) |
|
British Thermal Unit | 120.69 BTU/hr (Access) 24.02 BTU/hr (HDD Hibernation) |
|
Notes | For more information on how power consumption is measured, refer to this article. | |
Temperature
|
Operating Temperature | 0°C to 40°C (32°F to 104°F) |
Storage Temperature | -20°C to 60°C (-5°F to 140°F) | |
Operating humidity | 8% to 80% RH | |
Storage Humidity | 5% to 95% RH | |
Others
|
System Fan | 92 mm x 92 mm x 2 pcs |
Noise Level* | 20.4 dB(A) | |
Notes | Noise testing was conducted with the Synology system fully installed with Synology SATA HDDs and in an idle state. Two G.R.A.S. Type 40AE microphones are placed at a 1 m distance from the front and rear of the device. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8% | |
Certification
|
|
|
Warranty
|
3-year hardware warranty, extendable to 5 years with EW201 | |
Notes |
|
|
Environment & Packaging
|
||
Environment
|
RoHS Compliant | |
Packaging Content
|
|
|
Optional Accessories
|
|
What are my payment methods
• Bank Transfer - No Fees
• Credit Cards - VISA, MasterCard 1.5% Handling Fee
• PayPal - 2.75% Handling Fee
Bank Transfer
In order to pay for your order by bank transfer, you must first complete the
checkout process as normal. Upon completion you will be issued with an invoice
for your order which will be processed once your payment clears. From here you
may log onto your internet banking and make a payment for the order amount to
the bank account listed below. Alternatively, you may visit your local branch,
fill out a Deposit Slip with the correct details using the information below
and process this transfer with the bank teller in person.
Bank: Westpac Banking
Corporation
Account Name: ZCOMPUTE PTY LTD.
BSB: 034108
Account Number: 606317
Please add your invoice number and name in the description area when placing your deposit. If you do not have the relevant details on hand, or are unable to add the description, please email or fax through a copy of your deposit receipt as soon as possible. Please note that your order will not be processed until the funds have successfully deposited into our bank account and the payment has been confirmed as received by our accounts department. This process takes 1 - 5 business days.
Credit Card
Zotim accepts all major credit cards - Visa,
Master Card and Debit Cards. Please note, credit card handling fees do apply as
follows: VISA/MasterCard at 1.5%. These fees are comprised of Merchant Service
fees, Terminals fees, fraud prevention costs that cannot absorb due to the
extremely lower than retail prices we offer.
Please note: Due to the rise of credit card fraud
and for your security all credit card orders will be subject to advanced
security checks. If your order does not meet our security check requirements,
you will be contacted and further credit card security procedures will be
implemented.
Shipping
We prefer to use couriers for shipping which include Couriers Please. Startrack and Toll Express.
The courier require a signature on delivery so please give a delivery address where someone will be available to sign for the parcel.
We can use Australia Post as well, however parcels sent through Australia Post are not insured for loss or damage.
How is shipping cost calculated?Shopping at zotim.com.au is all about how much you can save with our shipping methods. As a brief summary - if you buy more than 1 item, your shipping cost for the 2nd, 3rd & subsequent items will be less than the first item!
We can afford this mainly because the cost of the delivery driver travelling to your address is already covered by the first parcel delivery charge, so the remaining parcels are only charged by the additional weight.
Note that we aren't always able to add items to orders after the order is placed, so be sure to order everything you want in one go when you first checkout, to ensure the quickest possible processing of your order, and the lowest possible shipping cost. We also aren't able to merge orders - the above images show what is possible if all items from Order 1 and 2 are ordered on a single order, it does not infer that we can combine multiple orders (our system is unable to accommodate this at this time).
Flat Shipping Fee $14.99
Fast Delivery
Fast shipping on all orders
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Save Big Every Order Guarantee
Online Support 24/7
Support Online 24Hrs A Day
Money Back Return
Back Guaranteed Under 7 Days
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Information
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Zotim is a trading name of Zcompute Pty Ltd (ABN 94 613 746 535) — © 2025 Zcompute Pty Ltd. All rights reserved.