Why such a slow connection to Synology NAS?

Question

NAS

Good afternoon! There was a problem. They brought a NAS from Synology (DS216j) to our office. We connected it to a router (Asus RT-AC87U), set it up. Everything would be fine, but the download speed on the NAS is 1-2Mb / s, which is extremely slow for us. Since many sources weigh 500-1000MB each. Work computers connect to the NAS via wifi.
What could be the problem? Is it all wifi restrictions, or something is configured wrong?

Answer 1

The second consideration regarding the drop in speed: look at the processor load on the device. Either in the terminal, or through the widget on the start page of the web interface. We recently had a story when DrWeb antivirus on Win7 clients "hung" Synology, whose processor load was close to 100%. Techpod from DrWeb recommended a pair of keys in samba.conf - while the flight is normal.
Do not forget, Synolgy has two network cards that can be easily combined into one (bond) through the interface and get conditional 2Gbit via wire)