& FREE Delivery
Arrives: 3 - 5 Feb
Only 3 left in stock.
Ships from PCLIVE
Sold by PCLIVE
Ships from

Sold by

Other Sellers on Amazon
+ FREE Delivery
Sold by: Computer Alliance Pty Ltd

Synology 4 Bay NAS DS420j (Diskless), 4-Bay; 1GB DDR4

4.6 out of 5 stars 98 ratings

Price: $459.00 & FREE Delivery
Your transaction is secure
We work hard to protect your security and privacy. Our payment security system encrypts your information during transmission. We don’t share your credit card details with third-party sellers, and we don’t sell your information to others. Learn more
  • 4-bay home NAS with over 60 TB raw capacity support suitable for data backup and file sharing
  • 64-bit 4-core 1 4 GHz processor and 1 GB DDR4 memory
  • Over 112 MB/s encrypted sequential reading and writing throughput
  • Easy-to-deploy surveillance solution that supports up to 16 IP cameras
  • Energy-saving design with only 7 88 W consumed in hibernation mode
New (4) from $459.00 & FREE Delivery

Get 90 days FREE of Amazon Music Unlimited
with the purchase of any eligible product. Shop now

Special offers and product promotions

  • Listen FREE for 90 days
    Get 90 DAYS FREE of Amazon Music Unlimited with purchase of an eligible product. Learn more here

Product Information

Technical Details

Collapse all

Additional Information

Warranty & Support

Amazon.com.au Return Policy:You may return for a full refund for the price you paid within 30 days of delivery any new computer purchased from Amazon that is "dead on arrival", arrives in damaged condition or is still in unopened boxes. Amazon may test or inspect returns. If Amazon finds a customer has misrepresented the condition of a return, Amazon may impose a fee equal to up to 15 percent of the merchandise sales price. Any returned computer that is damaged through customer misuse, missing parts, or in unsellable condition due to customer tampering may result in the customer being charged a restocking fee based on the condition of the computer. This policy does not restrict or alter any non-excludable statutory consumer protections or rights you may have, including under the Australian Consumer Law. To view full returns terms including return instructions, merchandise-specific requirements and exclusions see our Returns Policy Page. New, used, and refurbished products purchased from Marketplace vendors are subject to the returns policy of the individual vendor.

Frequently bought together

  • Synology 4 Bay NAS DS420j (Diskless), 4-Bay; 1GB DDR4
  • +
  • Seagate IronWolf 8TB NAS Internal Hard Drive HDD – 3.5 Inch SATA 6Gb/s 7200 RPM 256MB Cache for RAID Network Attached Storage – Frustration Free Packaging (ST8000VN004) (ST8000VNZ04/N004)
  • +
  • Seagate IronWolf 6TB NAS Internal Hard Drive HDD – CMR 3.5 Inch SATA 6Gb/s 5600 RPM 256MB Cache for RAID Network Attached Storage – Frustration Free Packaging (ST6000VN001)
Total Price: $1,012.60
Buy the selected items together

Have a question?

Find answers in product info, Q&As, reviews

There was a problem completing your request. Please try your search again later.
All Product Information Customer Q&A's Customer Reviews

Your question might be answered by sellers, manufacturers, or customers who bought this product.

Please make sure that you've entered a valid question. You can edit your question or post anyway.

Please enter a question.

Product description

DS420j is a 4-bay desktop NAS designed for home users' data backup and file sharing It supports various networking protocols multiple RAID configurations and diverse add-on packages effortlessly enabling cross-platform file synchronization and sharing on a private cloud DS420j is backed by Synology’s 2-year limited

From the manufacturer

DS420j DS220j DS120j
DS420j DS220j DS120j
Drive Bays 4 2 1
Max Raw Storage Capacity 64 TB (16 TB drive x 4) (Capacity may vary by RAID types) 32 TB (16 TB drive x 2) (Capacity may vary by RAID types) 16 TB (16 TB drive x 1) (Capacity may vary by RAID types)
CPU 4-core 1.4 GHz 4-core 1.4 GHz Dual Core 800 MHz
Hardware Encryption Engine
Memory 1 GB DDR4 512 MB DDR4 512 MB DDR3L
1GbE LAN Port 1 1 1
USB Port 2 x USB 3.0 2 x USB 3.0 2 x USB 2.0
Supported RAID Type Synology Hybrid RAID (SHR), Basic, JBOD, RAID 0, RAID 1, RAID 5, RAID 6, RAID 10 Synology Hybrid RAID, Basic, JBOD, RAID 0, RAID 1 Basic
Maximum IP cameras 16 12 5
Power consumption 21.71 W (Access), 7.88 W (HDD Hibernation) 12.46 W (Access), 5.06 W (HDD Hibernation) 9.81 W (Access), 4.68 W (HDD Hibernation)

Customer Questions & Answers

Customer reviews

4.6 out of 5 stars
4.6 out of 5
98 global ratings
How are ratings calculated?

Review this product

Share your thoughts with other customers

Top reviews from Australia

There are 0 reviews and 0 ratings from Australia

Top reviews from other countries

Amazon Customer
5.0 out of 5 stars Excelente solución
Reviewed in Mexico on 11 November 2020
Verified Purchase
5.0 out of 5 stars 入門編以上の実力
Reviewed in Japan on 18 June 2020
Verified Purchase
7 people found this helpful
Report abuse
5.0 out of 5 stars Very elegant solution for a small buisness or home applications.
Reviewed in the United States on 29 August 2020
Verified Purchase
15 people found this helpful
Report abuse
Jeffrey J. Miller
5.0 out of 5 stars Superior in Every Way
Reviewed in the United States on 4 October 2020
Verified Purchase
Customer image
5.0 out of 5 stars Superior in Every Way
Reviewed in the United States on 4 October 2020
I had a Buffalo LS441d populated with 4x2tb HDD in RAID5 and it seemed to run fine, albeit a bit slow. It served mainly as a Mac Time Machine backup station (5 Macs) and a bit of excess file storage. A few weeks ago it reported #3 drive failure, so I put in a new HDD, and it reported as a failure, so I put in another HDD, and it too reported as a failure. Switching the drive order, the nonetheless the #3 HDD was always a failure, so I could only conclude the #3 SATA bus had failed. Thus a new NAS.

After much research it appeared the Synology DS420j was the most economical solution. It arrived a day early so I populated it with the 4-2tb HDDs from my Buffalo and connected it up. Went through the setup routine and it went ahead and automatically formatted them in Synology's Hybrid RAID format. In the future, this will allow me to swap out any HDD with one of a larger capacity to increase the RAID volume size. I may now ditch my 2 spares for something with greater capacity, we shall see. Reportedly it will accept up to 16tb HDDs.

The UI is very robust, but it not intuitive. There were multiple steps necessary in order to setup the Time Machine folder, but it wasn't onerous and there was a simple tutorial ready on Synology's website. Performance wise it is hands down superior to the Buffalo as I'm seeing markedly faster Time Machine backups and file transfers, even simultaneous Time Machine backups perform materially quicker than with the Buffalo. I suspect this is due to the 4-core CPU and a gig of RAM, as both the DS420j and the Buffalo unit are 1g ethernet. The UI has a performance monitoring widget and even when being hit with 4 Macs backing up simultaneously the CPU never exceeded 60% and RAM utilization stayed at or below 50%. Another plus is that it is SMART aware as it will periodically SMART test the HDDs and send audio and email alerts to any impending HDD degradation issues.

As for noise, it is quieter than my HP LaserJet. Presently it is setup in default fan mode (quiet), but it doesn't report any heat issues.

My one quibble is that even though the HDDs are reported to be hot-swappable, the access is through the rear of the case, so it is not really convenient to swapping a drive while the unit is running unless it is setup in a unique location.
Images in this review
Customer image
Customer image
4 people found this helpful
Report abuse
5.0 out of 5 stars Buy it!
Reviewed in the United States on 11 December 2020
Verified Purchase
One person found this helpful
Report abuse