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.
Great product but not great experience because of other reasons...see below.
12 March 2014
Summary: This is a tough one. I have a Synology DS1812+ and bought the DX513 as an expansion unit. There was no problem with the unit BUT its was NOT the same design as my DS1812+ (that I bought just 4 months ago)...there are some small and very annoying variations. The chassis did not match identically (size-wise and some of the design elements - LEDs, etc.).
Four of five bays not detecting drives - required a DSM update on DS1511+
7 February 2014
Summary: I am updating this review after identifying a fix. When the exchange unit arrived with exactly the same problem (four out of five bays do not work), I decided to search for firmware update for, not the DX513, but the DS1511+ that the DX513 is connected to. The tech support at Synology apparently does know their own product. It seems that the real issue is that the DSM on DS1511+ needs to be updated from its 2011 version 3+ to the current 4.