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Average rating
Energy consumption
  • 4.6 / 5 stars
    0 reviews
Installation
  • 5 / 5 stars
    0 reviews
Software
  • 5 / 5 stars
    0 reviews
Speed
  • 4.6 / 5 stars
    0 reviews
Most helpful review

Product number
  • 864803
  • 859106
  • 797869
  • 853741
  • 857162
Manufacturer code
  • TS-231K
  • TS-251D-2G
  • DS218play
  • AS3102T v2
  • DS420j
Brand
  • QNAP
  • QNAP
  • Synology
  • Asustor
  • Synology
Warranty
  • 2 years
  • 2 years
  • 2 years
  • 3 years
  • 2 years
Warranty type
  • Carry-in warranty
  • Carry-in warranty
  • Carry-in warranty
  • Carry-in warranty
  • Carry-in warranty
Old product returned for free
  • Yes
  • Yes
  • Yes
  • Yes
  • Yes

Number of hard drive bays
  • 2
  • 2
  • 2
  • 2
  • 4
Internal RAM
  • 1 GB
  • 2 GB
  • 1 GB
  • 2 GB
  • 1 GB
Total number of RAM slots
  • 1
  • 2
  • 1
  • 2
  • 0
Integrated hard drive
  • No
  • No
  • No
  • No
  • No
Suitable for hard drive size
  • 2,5 inch HDD, 2,5 inch SSD, 3.5-inch HDD
  • 2,5 inch HDD, 2,5 inch SSD, 3.5-inch HDD
  • 2,5 inch HDD, 2,5 inch SSD, 3.5-inch HDD
  • 3.5-inch HDD
  • 2,5 inch HDD, 2,5 inch SSD, 3.5-inch HDD, mSATA
Cache memory
  • 521 MB
  • 0 MB
  • 0 MB
  • 0 MB
SATA connector type
  • S-ATA (III)
  • PCI-e 2.0 x4
  • S-ATA (III)
  • S-ATA (III)
  • S-ATA, S-ATA (II), S-ATA (III), mSATA (6Gb/s)
RAID
  • BeyondRAID, Hot spare, JBOD, RAID 0, RAID 1, SimplyRAID
  • Hot spare, RAID 0, RAID 1
  • JBOD, RAID 0, RAID 1, Synology Hybrid RAID
  • JBOD, RAID 0, RAID 1
  • JBOD, RAID 0, RAID 1, RAID 10, RAID 5, RAID 6, Synology Hybrid RAID

NAS functions
  • Backup server, Database server, Download server, FTP server, Mail server, Media server, Photo server, Print server, Surveillance station, VPN server, Web server, iTunes server
  • Backup server, Database server, Download server, FTP server, Mail server, Media server, Photo server, Print server, Surveillance station, VPN server, Web server, iTunes server
  • Backup server, Download server, FTP server, Media server, Photo server, Surveillance station, VPN server, Web server
  • Backup server, Database server, Download server, FTP server, Mail server, Media server, Photo server, Print server, Surveillance station, VPN server, Web server, iTunes server
  • Backup server, Database server, Download server, FTP server, Mail server, Media server, Photo server, Surveillance station, VPN server, Web server, iTunes server
NAS application center
  • Yes
  • Yes
  • Yes
  • Yes
  • Yes
DLNA
  • Yes
  • Yes
  • Yes
  • Yes
  • Yes
UPnP AV support
  • Yes
  • Yes
  • No
  • Yes
  • No
FTP server
  • Yes
  • Yes
  • Yes
  • Yes
  • Yes
On/off switch
  • Yes
  • Yes
  • Yes
  • Yes
  • Yes
Kensington lock
  • Yes
  • Yes
  • Yes
  • Yes
  • No
Apple Time Machine support
  • Yes
  • Yes
  • Yes
  • Yes
  • Yes
Chromecast support
  • Yes
  • Yes
  • Yes
  • Yes
  • Yes
Maximum number of simultaneous users
  • More than 10
  • More than 10
  • Less than 10
  • More than 10
  • Less than 10
Number of IP camera licenses included
  • 2
  • 2
  • 2
  • 4
  • None
Plex support
  • No
  • Yes
  • Yes
  • Yes
  • No
Automatic switch on/off
  • Yes
  • Yes
  • No
  • Yes
  • Yes
Suitable for IFTTT
  • Yes
  • Yes
  • No
  • No
  • No
Recommended for use
  • Making a backup, Save photos and videos
  • Making a backup, Media streaming, Save photos and videos, Storing games
  • Making a backup, Save photos and videos
  • Making a backup, Media streaming, Personal cloud, Save photos and videos, Storing games
  • Making a backup, Media streaming, Personal cloud, Save photos and videos, Storing games
Plex support type
  • Full HD (1080p)
  • HD Ready (720p)
  • Full HD (1080p), HD Ready (720p), SD (480p)

Best tested
  • No
  • No
  • Yes
  • No
  • No

LACP Link aggregation
  • Yes
  • Yes
  • No
  • Yes
  • No
iSCSI support
  • Yes
  • Yes
  • Yes
  • Yes
  • Yes
Thunderbolt connector
  • No
  • No
  • No
  • No
  • No
Bluetooth
  • No
  • No
  • No
  • No
Connection type
  • Wired, Wireless
  • Wired
  • Wired
  • Wired
  • Wired
Ethernet speed
  • Gigabit Ethernet (1000Mbps)
  • Gigabit Ethernet (1000Mbps)
  • Gigabit Ethernet (1000Mbps)
  • Gigabit Ethernet (1000Mbps)
  • Gigabit Ethernet (1000Mbps)
Number of ethernet ports
  • 2
  • 1
  • 1
  • 2
  • 1
ANT+
  • No
Number of female standard USB-A ports
  • 2
Female standard USB-A port version
  • 3.0
Number of female standard USB-B (3.0 form) ports
  • 3
Female standard USB-B (3.0 form) port version
  • 3.0

Processor
  • Annapurna Labs Alpine
  • Intel Celeron
  • RealTek
  • Intel Celeron
  • RealTek
Processor brand
  • Annapurna
  • Intel
  • RealTek
  • Intel
  • RealTek
Processor cores
  • Quad-Core (4)
  • Dual-core (2)
  • Quad-Core (4)
  • Dual-core (2)
  • Quad-Core (4)
Clock speed
  • 1,7 GHz
  • 2 GHz
  • 1,4 GHz
  • 1,6 GHz
  • 1,4 GHz
Turbo speed
  • 1,7 GHz
  • 2,7 GHz
  • 1,4 GHz
  • 2,48 GHz
  • 1,4 GHz
Processor family
  • Celeron
  • RealTek
  • Celeron
  • RealTek
Processor code name
  • Gemini Lake
  • RealTek
  • Braswell

Depth
  • 21,9 cm
  • 22,6 cm
  • 22,25 cm
  • 21,8 cm
  • 23 cm
Width
  • 10,2 cm
  • 10,5 cm
  • 10 cm
  • 10,2 cm
  • 16,8 cm
Height
  • 16,1 cm
  • 16,8 cm
  • 16,5 cm
  • 16,5 cm
  • 18,4 cm
Type NAS
  • Upright
  • Upright
  • Upright
  • Upright
  • Upright
Color
  • White
  • White
  • Black
  • Black
  • Black
Weight
  • 1,35 kg
  • 1,5 kg
  • 870 g
  • 1,17 kg
  • 2,21 kg
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