IP Camera Network config to be minimize office network traffic

Greetings,

I want to know the best practice (Physical setup as well as Network Protocol configuration)  for the set up of
the following IP Camera Project:

I'm installing 6 IP Cameras in an office that  has an existing network.
I don't want the IP Camera video recording network traffic to slow down the existing office network traffic.
The IP Cameras will record directly to Network Shares on a dedicated  NAS Box just for the IP Cameras.

Here is the equipment to be used for new IP Camera project: (No DVR will be used)
6 - Axis M3025 IP Cameras
8 - Port PoE Switch
NAS4Free NAS PC with 2 gigabit NICs. This NAS box is only for IP Camera recorded video.
Axis Companion Software on a few of the office workstations on the existing network.
Any necessary CAT5e Cable runs we need (all under 300ft.)

The office is using a Sonicwall TZ200w  as the Gateway Router to the internet.
Each IP Camera will need to have access to the  internet (Sonicwall TZ200w) for email notifications and occasional live smart phone viewing.
4 workstations on the existing network will need to have access to each of the 6 IP Cameras for occasional playback purposes.

Any information / suggestions is appreciated.

Thank you.