Hello. I have a Raspberry Pi 4B 4GB with the official 64 bit Ubuntu 20.04 image (5.4.0-1011-raspi kernel and Samsung Evo+ SD card if that helps). I am using it as a NAS and have several USB HDDs connected. The issue I've got is that I'm only getting about 70-80MB/s SMB transfer speeds or about 650 M...