Cannot Connect Qnap NAS to PC

[Yottabyte_AVD1]

Hi there,

TL:DR
I am trying to setup my NAS to my PC using ETH 2 on the 453D however Reading is okay but it cannot write to the NAS.

 

Objective:
NAS Service network on ETH 1 on 1Gbe Line
NAS Server to my PC on ETH 2 on 2.5Gbe Line (Dedicated)

 

Problem:

Anytime I Write to the NAS Windows File Explorer Crashes. Which then I have to restart my PC

 

Detailed:
NAS Eth 1 - Connected to Switch - Then to rest of network. (Status OK)
NAS Eth 2 - Connected QNA-UC5G1T TO PC. (Status Poor)
PC Eth 1 - Mobo Connected to Switch. (Status OK)
PC Eth 2 - Connected QNA-UC5G1T TO PC. (Status Poor)

PC is discovering ETH 2 on 192.168.2.2. 
PC mount disk...OK
PC Read to Disk...OK
PC Write to Disk...FAIL

 

Setup:
PC Setup is the following:

ETH 2
IPv4
192.168.2.1
DNS: 8.8.8.8 and 8.8.4.4

 

Please let me know if there is anything I can do. 

[NelizMastr]

You don't need DNS or a gateway setup for your  ETH2 interface on either end. DNS won't function as there is no DNS on that subnet nor internet access.

 

Have you tried disconnecting your eth 1 on your PC to force traffic over the 2.5GbE?