NAS326 Slow Ethernet Transfers after Win 11 Upgrade

roartiz

I did a clean install the other day to take me from Windows 10 up to Windows 11 and ever since, my transfer speeds to my NAS326 have been substantially slower (around 17MB/s tops). Previously I would get speeds of at least 80-100 MB/s, so transferring files from my PC to the NAS is taking easily 4x longer compared to before.

Nothing has changed with my PC or network hardware, nor the configuration. I have tried swapping cables as well. The NAS and my PC are both connected via ethernet directly to my router, and the NAS has a static IP address with its adapter showing "1000 Mbps, full-duplex". I'm on a 1000Mbps internet connection and the NAS is mapped via Windows File Explorer. I'm using up to date drivers for ethernet on my PC and the NAS firmware is current.

I have noticed that, while transferring, the NAS CPU is pinned at 100%. I'm not sure if this was ever the case before because I can't say that I looked, but I think that may be worth mentioning.

Any help would be greatly appreciated!