My current setup at home:

Fibre modem to SG105E 

SG105E split to a router & my PC

Router provides wifi & is also linked to my NAS and TV

The problem i have is that my PC is not sharing the same network with my router, hence i have no access to my NAS from my PC. 

My PC, when set to static IP will not be able to access the internet & only able to connect to the switch. 

I have tried setting my switch to static IP but i am not able to get the router to follow suit. 

What do I have to do to make my PC & router share the same network so the PC can access the NAS linked to the router? 

Thanks in advance! 

Jon