Very quiet and no complaints. But you will have to climb through the settings, as an example, it will not turn on itself if there is a short-term power outage, this actually often happens at night, so I recommend buying immediately with an uninterruptible power supply. And take a responsible choice of disks, there are many articles about this, good luck. Some pros: Very user-friendly interface and sharp security settings. It is full of software and there is open source, you can add something of your own with direct hands. I use a photo reserve and a server for cameras as a personal leaning, in principle everything, but the functionality is more than enough, at least create your own mail. Different cons: everything is good, but I think I will buy more with four or more slots.
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