Windows 10: Extremely slow intranet file transfer speed

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  1.    14 Mar 2018 #1

    Extremely slow intranet file transfer speed

    Windows 10 Pro
    Build: 1709
    OS Build: 16299.309

    I have three pc's on my home network. One had windows 10 from the factory the other two were Win 7 and 8.1 and all were experiencing 70-90MB/sec file transfer speeds. My internet was and still is 60MB/sec. After upgrading to windows 10 the file transfer speeds went to 5-8MB/sec. Internet speed is unaffected.

    I have followed many forums and tried every suggestion and nothing has resolved this issue. The last big windows 10 update did slow down the native windows 10 machine from 70-90MB/sec to 50-60MB/sec. Also, the native Win 10 machine is connecting via wifi and others via ethernet (wired)
    Any new ideas? Yes, latest drivers. Yes, Large Offload is disabled and many other suggestions.

    Thanks in advance
      My ComputerSystem Spec

  2.    14 Mar 2018 #2

    How are you copying the files ie cmd, explorer, other depending on the file types anti virus can make it crawl as it scan on read and write. try using built in robocopy as that is very fast see what that gives you How to Sync Files Using RoboCopy on windows 7 - YouTube
      My ComputerSystem Spec

  3.    14 Mar 2018 #3

    Using windows explorer. Same procedure as before. using Windows security (Defender).
      My ComputerSystem Spec

  4. bro67's Avatar
    Posts : 4,928
    Mac OS High Sierra 10.13.5
       14 Mar 2018 #4

    Sounds like something else is going on. Any changes with the network adapters? Are these wired computers or wireless?
      My ComputerSystem Spec

  5.    14 Mar 2018 #5

    Only change was the upgrade. The laptop that came with Windows 10 Pro is on wifi. The upgrade is on a 1GB ethernet full duplex connection. Also, the internet connection speed is mostly unchanged.
      My ComputerSystem Spec

  6.    16 Mar 2018 #6

    Although it should not have an effect, just give it a try:
    If SMB 1.0/CIFS File Sharing Support is not enabled, enable it and see whether it has an effect.
      My ComputerSystem Spec

  7.    16 Mar 2018 #7

    Full duplex can slow it to a crawl it true to send and receive at the same time and often the network can't cope so it has to resend packets most home routers can't cope with duplex
      My ComputerSystem Spec

  8.    17 Mar 2018 #8

    So SMB 1.0/CIFS File Sharing Support was enabled.
    Why would 'most' home routers be unable to cope with full duplex. I have an ASUS RT-AC87U (AC2400) router with gigabit ethernet. Also, why would my network have been 80-100 MB/sec prior to upgrading to Windows 10 if my router could not 'cope' with full-duplex? My laptop, which came with Windows 10 uses wifi to connect to my network is able to transfer files at 50-60MB/sec. Hmmmm.

    Again, the only change was the upgrade from Windows 8.1 to 10. No other hardware changes were made at the time.
      My ComputerSystem Spec

  9.    17 Mar 2018 #9

    Hi there


    I'm not sure if it will work for everybody but what I did to solve this type of problem was

    1) Install a decent FAST wifi extender with 4 Lan ports on it ( have 4 computers I need to connect - the 5GHZ wireless is fast enough for any sensible rate file transfer -- regularly getting speeds of around 115 MB/s ( X 4 for Mb/s !!)/

    2) a decent netgear small 5 port 1 Gb/s network switch model GS205 -- only a few USD and I mean a few and absolutely 100% worth it. (Approx 11 GBP inc VAT / 12 EUR/ USD )

    Click image for larger version. 

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    3) individual Lan cables from the 4 computers to the lan switch.

    4) 1 single Lan cable from switch to Lan extender.

    This allows all the computers faster wifi access of the 5GHZ band - especially those that don't have 5 GHZ wifi including a desktop that doesn't have wifi at all. The extender and network switch take care of that problem. The network switch takes care of all the "handshaking" and protocols needed for maximum network throughput so that's another less fiddling around with router config / network settings to worry about !!!.

    You need a good wifi extender though - I'm using a Netgear Black hawk -- It has 3 antennas and I need this as the computers are situated nearly 100 metres from the main router. I've been kicked out of the main house into a "man Shed" 100 metres from main house !!!! . The network switch is about 1 metre from the computers

    4) single lan cable from the switch to wifi extender (approx. 25 metres). Wifi from extender to Router.

    Works perfectly.

    Strange thing is that without the switch i.e with 4 lan cables from computers going to the extender the network transfer speeds were far slower !!! but the switch made it all work fantastically OK.

    Quite happy with current speed with 4 computers running concurrently 2 file transferring, 2 Internet browsing average speed on all of them (remember 100 metres from main router and using an extender via Wifi).

    Speed over Wifi extender :

    Click image for larger version. 

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    Maybe some Network guru can explain why this worked better than using 4 or 5 individual LAN cables to the extender - my initial reason for the network switch was to minimize the amount of LAN cables I had around the place.

    Final test - A laptop with no LAN connector with just Wifi in the same shed - much slower speed (around 10X slower). Added USB-->LAN adapter and connected to the switch -- Laptop performing as the others at 10X faster network speed !!!

    I also have a Centos rel 7.2 Linux file server / NAS on the 5th port of the switch running 24/7 also in the shed - supplies multi-media etc - perfectly fine for video streaming etc - "She who must be obeyed" !!! loves it too as no more cables / boxes near TV etc which she was always complaining about !!!. _ Now she can Vacuum behind TV etc !!!!!!!. As the Server doesn't have Wifi this is also a perfect solution too.

    Last edited by jimbo45; 17 Mar 2018 at 03:46.
      My ComputerSystem Spec

  10.    19 Mar 2018 #10

    I guess I do not understand. I have been on several other forums including Microsoft and I have clearly identified that the only change was an upgrade to the o/s. No changes to the network, pc hardware and yet everything other than the upgrade is explored as if I have misstated my situation.
    I am frustrated. I have been attempting to find a solution for this for several years now.
      My ComputerSystem Spec

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