Slow USB

It’s unusual for the USB ports on the Latitude 5440 to perform slower than your Skylake 6th-gen system, especially given that this model should have USB 3.2 or higher, depending on the configuration. If you're using USB-A ports, they’re typically limited to USB 3.0/3.1 speeds (up to 5Gbps or 10Gbps, depending on the version). For USB-C, if it's not utilizing Thunderbolt 4 or USB 3.2 Gen 2x2, the speeds could be capped lower. I'd recommend checking for any driver updates for your chipset and USB controllers, as outdated or mismatched drivers can lead to performance bottlenecks. Additionally, testing with different cables or devices could also help rule out compatibility issues.

I have tried a wide range of devices and I use high quality cables which should work better

USB SS is what the A ports are marked as. The UEFI says my C port is USB 4