Windows 10 File transfer from pc to NAS slow and/or failing (Windows 10)

  • Thread starter Thread starter nl-Mike
  • Start date Start date
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nl-Mike

Hello,


I have a weird problem on Windows 10 that i didn't have with Windows 7/8. This is the situation:


I have a NAS (WD Mycloud) which always has a wired gigabit connection to my router.

I have a laptop with Windows 10 (version 1709) which i can connect to the router through gigabit ethernet or wireless N (stable 300mbps).

Both the laptop and the NAS have a static ip.

I connect to the NAS share as a mapped drive on my laptop.


In the past transferring files from my laptop to my NAS went super fast with stable speeds which you would expect from a wired gigabit or wireless N connection. But now i have the problem that transferring files to my NAS only gets speeds highly fluctuating between 0 and 6 MB/s and most often dropping to 0 and timing out and failing. This occurs both with the wired gigabit connection and the wireless N.


The weird thing is that when i transfer files the other way around (from my NAS to my laptop) i do get the expected stable speeds (100 MB/s on wired gigabit and 20 MB/s on wireless N). Also uploading to the internet works just fine so it only applies to local connections.


So this seems to be a LAN upload speed problem or maybe something with the disk writing speed from laptop to NAS.


I have tried many things already:

Reinstalled NIC drivers

Played around with various NIC settings

Disabled windows RDC feature

Disabled netsh tcp tuning service

Disabled all antivirus and firewall protection


Nothing solves it. This is a very annoying issue because the only workaround for me is tranferring files to a USB stick and then plugging that USB stick in my NAS.


Does anyone have any idea what the cause may be?

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