LAN file transfer very slow between two PCs

I'm trying to transfer videos and photos from my old PC to the new but the transfer rate is very slow. I have a gigabit router and both PCs are wired. Sometimes it gets to around 900Mbps then drops down to 50Mbps or even zero. Both PCs are on Windows 10 Pro 1809.

So far I have tried the following but nothing helps:


Disable NetBIOS on both PCs
Disable Auto tuning on both PCs
Disable Large Send Offload V1/V2 on new PC. Old PC does not have this listed.
Disable Remote Differential compression on both PCs
Increase Jumbo packet to maximum on both PCs

Any other ideas?

1. Do both PCs have gigabit ethernet?
2. What antivirus/antimalware programs do you have installed?
3. What are you using to copy the files? If you are doing it through File Explorer, that could take a long time. Windows has a little-known built-in Command Prompt copy program called "Robocopy" which is amazingly fast. Depending on how you configure it, you can actually copy multiple files at once. I use it to backup system image files to a secondary device. I can copy 12GB of date in under 3 minutes to my NAS.

JohnD

Yes both PCs have gigabit. I'm just using the built in Windows defender antivirus.
I have a folder that is shared on the new PC and I just drag and drop files and folders into it.

Dragging and dropping in File Explorer can be extremely slow. I highly recommend trying Robocopy. It is much faster. Here is a basic command:

Robocopy /S /MT {source directory} {destination directory}

This will copy all files and subfolders from the source directory to the destination directory. For instance:

Robocopy /S /MT D:\dir1\data1 E:\backup\data2

The /MT option indicates to run it multi-threaded which will be running 8 instances (the default) of Robocopy, copying more than one file at a time. The first file, depending on its size, may be a little slow but it will pick up speed as it goes along.

NOTE: In my example above, Robocopy will not copy the directory "data1", only its contents. They will end up in "data2". If you wanted the same directory name in the destination, you would have to create it beforehand. So to copy "data1" in the source to a "data1" in the destination, the directory "data1" must have already been created on the destination drive.

Robocopy /S /MT D:\dir1\data1 E:\backup\data1 ["data1" must exist on the destination drive]

JohnD

Ok I'll give this try but I don't understand how Robocopy will know the files/folders are to be copied to another PC on my network?
For example I have 100GB of videos and photos on drive D: on my old PC and I want to copy them over to drive E: on my new PC over the network. How does it know drive E: is on the other PC.

You map a drive on the other PC as drive e or any free drive letter

DigitalPixel said:

I have 100GB of videos/photos on drive D: on my old PC.
I want to copy them to drive E: on my new PC.
How does it know drive E: is on the other PC.

If E: is "mounted" as a share, then Windows knows that E: is on the other PC.
Programs don't know or care.

OK I understand. Thanks