we are planning to buy a NAS , but we are confused in qnap and Synology, please suggest us a better one, 30 users will be accessing the NAS,
With 30 users accessing it for file storage needs might require 10GbE connection. DS1522+ would be a good choice.
If you rather need multimedia access, then TS-673A with GPU card would be a better choice.
Otherwise, ds920+ / ts-464 will be a middle-ground solution.
I hope this helps.