I bought this NAS to use on my Hyper-V cluster (It is a lab environment before anyone starts saying I'm mental) and overall I have been pleasantly surprised by the unit.As far as being a NAS I concur with the comments that the unit is a tad under powered and like other NAS' the UI is a bit laggy. it is far from the worst I have used but it is definitely not the snappiest of units when working around the GUI etc.That being said it's no slouch and setting up shares and general administration is easy enough to do. I wouldn't be using this unit for anything other than bulk media storage (It is not going to be doing any transcoding or major performance workloads anytime soon) but as a box standard NAS for NFS/iSCSI it is absolutely fine.I think if I were using the system for a more inteligent workload I would be inclined to go for something with a bit more grunt for caching and managing the data but I am using it as an iSCSI target and so far I have had no issues.In fact I have been so pleased with the unit I bought another to replace a TS932X which decided it was going to permanently power off for good.The units I have are running with a mix of SSDs and 10TB+ HDDs without any issue or oddities, the iSCSI connection has stayed up with no major issues and upgrading the unit is easy but takes an absolute age to complete.The NICs on the unit are the main selling point in my opinion, this NAS got it right by having SFP+ for the 10G connection rather than copper so you have no worries of being able to use the unit as a stove topIn terms of noise the fan of the unit is reasonably quiet with the disk noises overpowering it.Overall they are great units if you just need bulk storage, if you are wanting something a bit more fancy for media sharing etc I would go with a unit that has a better CPU

Ho preso questo dispositivo per archviare materiale multimediale, ottimo sia per come è fatto, per il software e anche per l'espandibilità

The NAS works with no problem, but there some weak parts.Regarding hardware components. The Power Supply is external and as such has only passive cooling. Even with 1 HDD and 1 SSD it is around 40 degrees Celsius, just curious how hot it will become in summer when all 5 HDD will be running. Also, Racks made of plastic and have sliding issues (like plastic glues itself to other parts). I was choosing ARM NAS for lower noise and NAS by itself doesn't produce any. But on the back side of the NAS there are holes directly to HDD making zero HDD noise reduction. So, keep HDDs nearly open for cooling is nice, but plastic racks, dust and noise ruins those efforts.The worst part of this NAS is software. Getting exact information about supported software packages per model compatibility was very difficult. At least I was expecting to have WireGuard VPN support, which is not supported on my model. Also update of OpenVPN certificates to the newer (latest OpenVPN version required) protocols took really a lot of time. Data synchronization between two NASes (the counterpart is older 5-bay ARM model) via VPN tunnel worked reliably using OpenVPN protocol, IPSec was interrupting constantly and QBelt was about 30% slower comparing to OpenVPN. From my experience using any proprietary QNAP technologies makes nearly impossible to accomplish tasks in a timely manner. PhotoStation and Multimedia are non-reasonable slow. Using PhotoStation my mobile phone has to stay awake more than a day (about 30-40 seconds per 4Mb image file), but just copy 2Gb photos from my phone to NAP over WiFi network took using file copy took about 2 minutes. QFinder is also not reliably finds my NAS on network and doesn't wake it up using WOL. The only software that works relatively without problem is “kernel”.As a conclusion, I am disappointed with this model (my "older" QNAP NAS is better than this one), but still, you can use it as a raw NAS file storage... Also, I would not recommend relying on any software that you get/can install on this model unless you personally test it for your needs. Also, with my experience waiting for supporting "modern" secure algorithms and protocols from QNAP, you should never expose this device directly to internet.

Overall I added an 18tb Ironwolf Pro for main storage, a 4tb SSD for essential files, 2 x 1tb SSD for write caching and it's a solid performer, reliable and easy to update with excellent support, although if you just want Plex than I would go with something cheaper but for business use as well as general this is a winner.

If you know what you're doing and have good knowledge of managing NAS drives, storage allocation, user accounts, I'm sure you'll have no problem with this thing. However, if you're fairly new to this, it's not easy. The user guide is huge and there are a LOT of steps to setting this up, with some actions feeling like a leap of faith. I think because there are so many configurable options on this thing, it's become complicated.The HW itself seems sturdy enough and on the most part it's quiet. The only wind up being the main drive is constantly in use and tends to work slightly loose causing a resonating rattle, I keep having to ease the drive slightly left or right to stop it. I did appreciate a full collection of Hard drive screws, small thing but I appreciated it.The transfer rate is great. I've only got one cat 8 ethernet cable connected and I'm getting 112 MB/s constant transfer rate which I believe is about what the drives are rated for so no problems with that. I can't comment on multi user access as there is no need for me to do this.