Synology DiskStation 4 Bay Quad Core 1GB NAS (DS420j)

CPU Architecture

64-bit

CPU Frequency

Quad Core 1.4 GHz

Hardware Encryption Engine

Memory

System Memory

1 GB DDR4

Notes

Synology reserves the right to replace memory modules with the same or   higher frequency based on supplier's product life cycle status. Rest assured   that the compatibility and stability have been strictly verified with the   same benchmark to ensure identical performance.

Storage

Drive Bays

4

Compatible   Drive Type* (See all supported drives)

3.5" SATA HDD

2.5" SATA HDD

2.5" SATA SSD

Maximum Internal Raw Capacity

64 TB (16 TB drive x 4) (Capacity may vary by RAID types)

Maximum Single Volume Size*

108 TB

Hot Swappable Drive

-

Notes

"Compatible drive type" indicates the drives that have been   tested to be compatible with Synology products. This term does not indicate   the maximum connection speed of each drive bay.

The maximum single volume size is not directly related   to the maximum raw capacity. (Learn more)

External Ports

RJ-45 1GbE LAN Port

1

USB 3.0 Port

2

File System

Internal Drives

EXT4

External Drives

EXT4

EXT3

FAT

NTFS

HFS+

exFAT*

Notes

exFAT Access is purchased separately in Package Center.

Appearance

Size (Height x Width x Depth)

184 mm x 168 mm x 230 mm

Weight

2.21 kg

Others

System Fan

80 mm x 80 mm x 2 pcs

Fan Speed Mode

Full-Speed Mode

Cool Mode

Quiet Mode

Low-power Mode

Brightness Adjustable Front LED Indicators

Power Recovery

Noise Level*

20.6 dB(A)

Scheduled Power On / Off

Wake on LAN / WAN

Power Supply Unit / Adapter

90 W

AC Input Power Voltage

100 V to 240 V AC

Power Frequency

50/60 Hz, Single Phase

Power Consumption*

21.71 W (Access)

7.88 W (HDD Hibernation)

British Thermal Unit

74.08 BTU/hr (Access)

26.89 BTU/hr (HDD Hibernation)

Notes

Power consumption is measured when it's fully loaded with Western   Digital 1TB WD10EFRX hard drive(s).

Noise Level Testing Environment: Fully loaded with Seagate 2TB   ST2000VN000 hard drive(s) in the idle state. Two G.R.A.S. Type 40AE   microphones, each set up 1 meter away from the Synology NAS at the front and   rear. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75?C;   Humidity: 58.2-61.8%

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)

Relative Humidity

5% to 95% RH

Certification

FCC

CE

EAC

BSMI

VCCI

CCC

RCM

Warranty

2 Years

Notes

The warranty period starts from the purchase date as   stated on your purchase receipt. (Learn more)

Environment

RoHS Compliant

Packaging Content

Main Unit X 1

Accessory Pack X 1

AC Power Adapter X 1

AC Power Cord X 1

RJ-45 LAN Cable X 1

Quick Installation Guide X 1