Windows SMB SLOW Between Two Clients

[blattusz]

Hello!

I have 2 windows clients. On one client I created a folder share. I added this as a drive to the other client. These clients are in the same location and connected to the same router.
It is installed as Open Vpn service on the clients.
If I copy a file from this shared drive to say the desktop. Then it is very slow.
If I disable the VPN service then the copying is much faster..
I noticed that when copying, you use the TAP-Windows Adapter V9 installed by Open VPN, or the OpenVPN Data Channel Offload adapter.
I.e. I don't want to use VPN on the local network, but I want to connect to client machines remotely via remote desktop.

Thanks a lot if you can help me.

[never-stop-learning]

Hey man, try to use FTP/SCP or other data transfer protocol, it is not recommended to use the SMB for copying files within the VPN.

[blattusz]

Unfortunately this is not a solution, we want to work on the attached drive. PL Excel editing, Word docs etc.

[never-stop-learning]

Unfortunately, SMB protocol is always slow over the internet, please find the explanation from the Microsoft Article by clicking this LINK.

[blattusz]

Yes SMB protocol is slow remot. It's okey, but this problem is local area network.
Clients are in simple office and they connect a router in the office.

[never-stop-learning]

It is still better to use other data transfer protocols than fixing the case of SMB Protocol which is dependent on Microsoft