Comparison of Western Digital My Cloud EX2 Ultra, Synology DiskStation DS216+II and QNAP TS-251A

The side-by-side comparison of the devices’ specifications. The comparison table below makes it easier to choose the most fitting NAS.

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Adding/changing a NAS
	Western Digital My Cloud EX2 Ultra (WDBVBZ0000NCH) Remove	Synology DiskStation DS216+II (DS216P2) Remove	QNAP TS-251A (TS-251A) Remove
Launch	2016	2016	2016
Class	Small office / Home office	Small office / Home office	Small office / Home office
Body
Dimensions	165 x 157 x 99 mm	165 x 108 x 233.2 mm	169 x 102 x 219 mm
Weight	800 g	1.25 kg	1.28 kg
Disks
Disk bays	2 x 3.5" SATA III	2 x 3.5" SATA III	2 x 3.5" SATA III
RAID	JBOD RAID0 RAID1	JBOD RAID0 RAID1 Synology Hybrid RAID	JBOD RAID0 RAID1
SSD support	no	yes	yes
Network
LAN ports	1 x Gigabit Ethernet	1 x Gigabit Ethernet	2 x Gigabit Ethernet
Wireless	no	no	yes, with USB dongle
Protocols	AFP CIFS/SMB FTP ISCSI SFTP WEBDAV	AFP CIFS/SMB FTP ISCSI NFS WEBDAV	AFP CIFS/SMB FTP ISCSI NFS SFTP WEBDAV
P2P support	BitTorrent eMule	BitTorrent eMule	BitTorrent
Media server	DLNA UPnP iTunes	DLNA UPnP iTunes	DLNA UPnP iTunes
Cloud backup	Amazon S3 Dropbox ElephantDrive	Amazon S3 Box Dropbox Google Drive Microsoft OneDrive	Amazon S3 Box Dropbox Google Drive Microsoft OneDrive
Connectivity
USB ports	2 x USB 3.0	2 x USB 2.0 1 x USB 3.0	3 x USB 3.0
eSATA ports	no	1 x eSATA	no
System
CPU	Marvell Armada 385 88F6820 dual-core @ 1.3 GHz	Intel Celeron N3060 dual-core @ 1.6 GHz	Intel Celeron N3060 dual-core @ 1.6 GHz
RAM	1 GB DDR3	1 GB	2 GB (upgradable)
Flash			4 GB
Operating system	WD My Cloud OS	Synology DSM	QNAP QTS
Alternative OS
Power
Power supply	12 V / 4 A	12 V / 5 A	12 V / 5.4 A
Consuption		17.4 W / 7.4 W	16.2 W / 7.9 W
Fans	fanless	1 x 92 mm	1 x 70 mm
Noise level		18.2 dB(A)	18.3 dB(A)
Features
Specials		4k UHD transcoding	Failover and link aggregation HDMI output Infrared receiver Audio input Audio output
Administration
Default IP	DHCP	DHCP	DHCP
Default username	admin	admin	admin
Default password	[blank]	[blank]	admin

A maximum of 3 devices can be compared at the same time. To add or change a NAS, type the name of the NAS you’re looking for in the search field of the table’s column, then click on the device’s name in the drop-down list of search results.

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