DS220j is an entry-level 2-bay NAS designed for home and personal users to store and share photos, videos, and documents. The private cloud solution is powered by the award-winning DiskStation Manager (DSM) OS, providing an intuitive user interface and safe data protection approaches for easy digital asset backups from computers and mobile devices at no additional cost. Centralized backup solution for your digital devices Synology's comprehensive multi-version backup solutions protect your digital assets on computers (Windows/Mac) and mobile phones (Android/iOS) against malicious attacks, including the rising threat from encryption-based ransomware. Stream content to your TV Turn your Synology NAS into a home media hub and stream your digital content to your favorite electronic devices, including computers, mobile devices, Samsung TV, Apple TV, Google Chromecast, and DLNA devices. Synology Hybrid RAID (SHR) technology Storage management is easy with Synology Hybrid RAID (SHR) technology. SHR is an automated RAID management system that allows you to easily create and expand storage volumes and migrate RAID types without requiring details on the RAID setup. SHR provides 1-disk redundancy to safeguard your data in case of drive failures. Cost-effective SHR maximizes the data capacity of your RAID when different size HDDs are used. Calculate your RAID needs. Easy Management For new users with limited technical knowledge who want to protect their data using RAID technology, a convenient installation wizard will guide you through all the steps during your first installation. Scalability Add new disks on the fly in Storage Manager with a simple click. Learn more about SHR. Flexibility While creating a volume, choose to plan ahead and leave empty or unallocated space for future use. Seamless integration with your mobile devices Synology mobile applications are designed to give you quick and secure access to your data wherever you are. Powered by Synology DSM File Server/Management Powerful built-in file management and sharing services. Multimedia Complete multimedia solution for management, streaming, and playback. Hyper Backup Store multiple backup versions with block-level incremental data backup and cross-version deduplication. DSM UI Award-winning operating system with an intuitive user interface and powerful capabilities. Security Comprehensive built-in security tools are constantly updated to protect your devices against evolving threats. All-in-one server Save additional investment by integrating various network services, web/mail services, management applications into your NAS.

Technical details
Sustainability certificates	RoHS
Processor
Processor family	Realtek
Processor manufacturer	Realtek
Processor model	RTD1296
Processor frequency	1.4 GHz
Processor cores	4
On-board graphics card model	ARM Mali-T820
Memory
Internal memory	0.512 GB
Internal memory type	DDR4
ECC	N
Ports & interfaces
Ethernet LAN (RJ-45) ports	1
USB port	Y
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity	2
Weight & dimensions
Width	100 mm
Depth	225.5 mm
Height	165 mm
Weight	880 g
Power
Power supply location	External
Power supply unit (PSU) capacity	60 W
Number of power supply units	1
Power consumption (typical)	12.46 W
Power consumption (HDD standby)	5.06 W
AC input voltage	100 - 240 V
AC input frequency	50/60 Hz
Operational conditions
Operating temperature (T-T)	0 - 40 °C
Operating relative humidity (H-H)	5 - 95%
Storage temperature (T-T)	-20 - 60 °C
Storage relative humidity (H-H)	5 - 95%
Operating altitude	0 - 5000 m
Network
Ethernet LAN	Y
Ethernet LAN data rates	10,100,1000 Mbit/s
Wi-Fi	N
iSCSI support	Y
Wake-on-LAN ready	Y
Data link protocols	SMB, AFP, NFS, FTP, WebDAV, CalDAV, iSCSI, Telnet, SSH, SNMP, VPN
Storage
Storage drives installed	N
Number of storage drives supported	2
Installed storage drive type	N
Supported storage drive types	HDD & SSD
RAID support	Y
Supported storage drive interfaces	Serial ATA
Storage drive sizes supported	2.5,3.5"
Maximum supported storage capacity	32 TB
RAID levels	0, 1, JBOD
Online RAID migration	Y
Online RAID expansion	Y
Hot-swap drive bays	N
Supported file systems	Fat, HFS+, NTFS, exFAT, ext3, ext4
Software
Operating system installed	DiskStation Manager
Windows operating systems supported	Windows 7
Mac operating systems supported	Mac OS X 10.11 El Capitan
Packaging content
External power adapter	Y
Cables included	AC, LAN (RJ-45)
Quick installation guide	Y
Other features
Digital Living Network Alliance (DLNA) certified	Y
Design
Chassis type	Mini Tower
Cooling type	Active
Product colour	White
Number of fans	1 fan(s)
Fan diameter	9.2 cm
LED indicators	HDD, LAN, Power, Status
Cable lock slot	Y
Cable lock slot type	Kensington
Performance
Type	NAS
Device class	Home & Home Office
Backup function	Y
Backup features	Cloud, iSCSI LUN
Multilingual support	Y
Noise level	18.2 dB
Web-based management	Y
Access Control List (ACL)	Y
Reset button	Y
On/off switch	Y
Built-in iTunes server	Y
Built-in FTP server	Y
Browser supported	Chrome, Firefox, Edge, Internet Explorer, Safari
Share folder	SMB/NFS/AFP/FTP
Logistics data
Harmonized System (HS) code	84714100