In thisMiniToolpost, we will introduce this issue and show you some effective solutions.
Are You Bothered by Windows 10 Slow File Transfer Speed?
The result showed thatthe C drive was almost full, without enough space to save the new iPhone backup.

Then, I used MiniTool Partition Wizard Boot Edition, a professionalpartition manager, toextend C Drive.
After a Windows reboot, the C drive extending process ended.
I thought everything was normal.

But very soon, I found another issue: Windows 10 slow file transfer speed.
At first, I tried to delete a file.
But that file still there after some seconds.

I tried to delete it again but only got a pop-up window sayingItem Not Found.Could not find this item.
This is no longer located in E:**.
Verify the items location and take another crack.

After a while, that file disappeared from the location.
It was so strange.
Then, I tried other operations like copying a file to another location or transfer it to another folder.

All processes were very slow.
I found many solutions.
It was solved after I restarted my computer.

(Why Rebooting a Computer Fixes Problems?
Answers Are Here)
Perhaps you may have a different problem with the same performance.
The issue persists even you have restarted your setup.
If so, you better use other methods to solve the issue.
I collect some useful solutions and show them in this post.
How to Fix Windows 10 Slow File Transfer Speed?
Method 1: Optimize Your Hard Disk
1.
OpenThis PCon your machine.
Right-punch any drive and then selectProperties.
Select one drive and then clickAnalyse.
Repeat this operation for all drives.
Method 2: Turn off Thumbnails in Windows 10
1.
OpenThis PCto access File Explorer.
Go toView > Options > Change folder and search options.
Check theAlways show icons, never thumbnailsoption.
Additionally, you might alsouse CHKDSKto check the file system of your drive and fix the found errors.
Reading here, you should know how to fix Windows 10 slow file transfer speed.
We hope you’re free to find a proper method from this post.