Windows 10: Windows Defender slow copy performance with small files to SMB share

I tried to add the SMB target (drive m to the exclusions, but it does not help. Copying 2000 small files is only possible with 3-8MB/s:




If I disable the real-time-scan its more than 40MB/s:




Why does the exclusion not work and why does Defender scan files that are copied to an external target?!

:)

 

File share copy speed slow

Hi.

I have a Windows Server hosting some shares.

The server has an 10GBPS network card and hosts connected through a 1GBPS ports.

When copying files down from server the copy speeds dont pass 10 mbytes per second.

When copying files up to server the copy speeds passes 100 mbytes per second.

I have used iperf to test network speeds and it easily shows that the network speeds are indeed 1gbps.

I also tried non-smb reliant file transfer tools and they all was able to reach 1 gbps speeds with no problem.

All other file copy tools using SMB was capped at same speed.

So the problem is quite strange and i am not sure where i should look next to resolve this

Any ideas anyone?

 

Updates slowing computer performance

Hi,

Listed below are possible causes why Windows is running slow:

• Too many application installed.
• Virus and malware.
• Corrupted system files.
• Outdated drivers.

For us to assist you with the concern, we suggest following the steps on this
article.

Update us with the outcome so we can provide further assistance.

 

Java.nio.file - Copying files

You can't copy a folder, thats why it generates an exception (you are trying to copy a folder using a copy file function).
You probably need to list all the files inside that folder and copy one by one