Product Comparison: QNAP TS-251B vs Synology DS218+

Advertiser Disclosure

This site is a free online resource that strives to offer helpful content and comparison features to its visitors. Please be advised that the operator of this site accepts advertising compensation from certain companies that appear on the site, and such compensation impacts the location and order in which the companies (and/or their products) are presented, and in some cases may also impact the scoring that is assigned to them. The scoring that appears on this site is determined by the site operator in its sole discretion, and should NOT be relied upon for accuracy purposes. In fact, Company/product listings on this page DO NOT imply endorsement by the site operator. Except as expressly set forth in our Terms of Use, all representations and warranties regarding the information presented on this page are disclaimed. The information which appears on this site is subject to change at any time. More info

General Specifications
About the Product
The TS-251B combines secure data storage and multimedia entertainment into one device. Featuring a PCIe slot, the TS-251B is QNAP’s first home/SOHO NAS that allows you to flexibly extend its functionality and potential applications.
Equipped with a dual-core processor and AES-NI hardware encryption engine, DS218+ delivers exceptional file transfer speeds. Supporting real-time 4K video streaming, DS218+ is ideal not only for protecting critical data but for storing ultra-high definition media contents as well.
Key Specs
Hard Drive Capacity
14 TB
24 TB
Number Of Slots
2 -bay
2 -bay
Storage Drive Type
2.5”, 3.5”, SATA 3Gb/s, SATA 6Gb/s, SSD, M.2 SSD
2.5”, 3.5”
What customers say about "Key Specs"
QNAP TS-251B Ideal NAS Enclosure
  • Easy to install the drives. Easy to set up and start using.
  • Complete access to the underlying Unix system allows for plenty of flexibility. Great hard drive capacity.
  • I installed two 4TB Seagate NAS rated hard drives, and set them up as a RAID 1, so that I have redundant storage in the event of a drive failure. It works great.
  • I used WD Blue drives in it and it works great!
  • Extremely slow when hard drive encryption is enabled.
Synology DS218+ 24TB NAS Solution
  • The DS218+ was a huge step up even though I'm not taking advantage of all the different applications that are available for it. Great number of slots.
Size & Weight
6.61 in.
9.1 in.
4.13 in.
4.2 in.
8.9 in.
6.5 in.
3.37 lbs.
2.87 lbs.
Intel Celeron J3355
Intel Celeron J3355
4 GB
2 GB
RAID Support
RAID 0, RAID 1, JBOD, Single
Synology Hybrid RAID, Basic, RAID 0, RAID 1
4K Media Playback, AES-NI hardware-accelerated encryption, Multi-OS Platform, Multi-point file backup, IFTTT Agent
Compact yet powerful storage solution, 4K Multimedia Server, Digital asset protection, Easy file access with QuickConnect
Included Software
QTS 4.3.4, iSCSI, myQNAPcloud, Qsync, Qfiling, Hybrid Backup Sync, Qsirch, OceanKTV, Qcontactz, Snapshot
NFS Plug-in for VMware VAAI, Snapshot Manager for Windows, Snapshot Manager for VMware, Cloud Sync Decryption Tool, Cloud Station Backup, Cloud Station Drive, Evidence Integrity Authenticator, Photo Station Uploader, Cloud Station, Synology Assistant, Synology Web Assistant
What customers say about "Features"
QNAP TS-251B Ideal NAS Enclosure
  • Easy to setup. Even getting the bonding interfaces is super simple. Nice Web UI. You also get the most usual options for RAID or setup you may want.
  • Runs very quiet. Nice selection of applications. Clients, servers, etc. To add a little bit to the basic NAS. Backup to other places.
  • I have a couple of Macs along with PC's. It was fairly easy to setup Time Machine.
  • Nice selection of apps from QNAP for IOS and Android.
  • Easy to set up, lots of options and software.
Synology DS218+ 24TB NAS Solution
  • Syslog server is great. Really handy if your router or firewall can send logs.
  • To start off out of the box the L2TP VPN never worked.
LAN Speed
1000 Mbps
1000 Mbps
Number of LAN
Number of USB
What customers say about "Interfaces"
QNAP TS-251B Ideal NAS Enclosure
  • I bought this primarily to be the central repository of stuff for my home. I consider HDMI a nice bonus.
  • HDs can be upgraded to higher capacity. RAM can be upgraded as well. Has HDMI output.
  • Initial setup was even easier using the provided HDMI output and keyboard.
  • Being able to easily upgrade the RAM was nice, as is the option to connect to video through HDMI.
  • Overall meet my expectations and more, especially the HDMI connection to my TV. Great connectivity options.
Warranty / Certifications
Manufacturer Warranty
2 year(s)
2 year(s)
Other Information

Other reviews