Summary: Have owned 2 of these -- one to expand a 2-bay chassis and one to expand an 8-bay. The first one did not survive a fall from desk height onto a hard floor. Should it have? Would any NAS product? Probably not a fair basis to deduct stars but I think my lost $500 for the chassis (+ $700 for 5 ruined hard drives) entitles me to throw down the gauntlet here on that question.
Summary: Synology is quite, frankly, the Apple of NAS - everything just works and it constantly delights you by going above and beyond. This is an add on to my existing 8-bay giving me a 40TB server. Incredible.
Summary: Synology makes great, solid products. Yes, it's overpriced. If this were half the price I'd give it 5 stars. But, I now have 20 TB of at-home storage with 2-disk failure fault tolerance. I upgraded from a QNAP NAS a few years ago and have never regretted the switch. And I'd buy it again.
**DO NOT BUY THIS PRODUCT** EASILY HACKED AND EXPLOITED FOR RANSOM
D. Wendling, Amazon
16 August 2014
Summary: **DO NOT BUY THIS PRODUCT** EASILY HACKED AND EXPLOITED FOR RANSOM GOOGLE: SYNOLOLOCKER Or simply go to the synology page: http://www.synology.com/en-us/company/news/article/470 Synology was also hacked earlier in the year for a BITMINING MALWARE turning your disk station into a bot. http://forum.synology.com/enu/viewtopic.php?f=19&t=80857 They are currently holding my entire archive ransom and Synology cant do a thing about it.
The best (well second) best IT investment I have made.
Michael Garcia, Amazon
30 July 2014
Summary: When I started running out of space with my DS-512+ I added larger drives. Then I added a USB 3.0 RAID expansion but since I couldn't merge the storage I have to connected, but separate, storage areas for my data. I knew about the expansion units but thought I could mimic the use by using the external RAID box. But functionality won out over cost so I splurged and got the DX513. The installation was a smooth and easy as could be.
Great Way to Expand the Primary Server Storage Capability
Jim M., Amazon
9 July 2014
Summary: A great way to expand your Synology system; however, the way Synology expands the server size, it takes a long time (days) to bring the expansion unit on-line. There are also known issues that can cause an expansion failure. Luckily, the failure doesn't affect the data one already has on the main server - one just has to start over on adding the expansion unit to the primary server. It was a bit frustrating, but still worth five stars once it is up and running.
Summary: Attached this unit to my 1513+ and the Synology software walked me through the setup. This unit, in addition to the 1513+ now gives me the capability of 35Tb of data storage. Great for small business and heavy media/graphics users.