Apparently you are not the only one.

https://forums.raspberrypi.com/viewtopic.php?t=249147

https://forums.raspberrypi.com/viewtopic.php?t=261016

On Fri, Oct 21, 2022, 2:01 PM Jim via PLUG-discuss <
plug-discuss@lists.phxlinux.org> wrote:

> I have a Raspberry Pi 4 with 8GB RAM and it's running Ubuntu 20.04.  It
> has gigabit ethernet built in.  The router everything's connected to is an
> Asus RT-ACRH13.  The computer is a Dell Optiplex 7010 with Kubuntu
> 22.04.  Everything's connected at 1Gb/s but I'm only getting about 46 MiB/s
> when transferring files from the Raspberry pi.  The files are stored on a
> 2TB Hdd connected to the Pi via USB3.   How can I get faster speeds from
> the Raspberry Pi?
>
>
> Thanks
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