SUMMARY KDE's Dolphin will show MiB/s, but doesn't send a notification detailing max speed, min speed, avg speed. A widget displaying transfer speed, like the network speed widget would be helpful. What is the transfer speed from my usb device to my hdd/ssd? A widget that displays that info and issues a notification indicating statistics would be much appreciated.
I would like to see widgets that display a graph of transfer speed, like Winblows. The y-axis should be the transfer speed of the channel, i.e., SATA-1 is 150 MB/s, SATA-2 is 300 MB/s, and SATA-3 is 600 MB/s. USB 1.0 low speed is 192 kB/s, USB 1.0 full speed is 1.5 MB/s, USB 2.0 high speed is 60 MB/s, USB 3.0 SuperSpeed (aka USB 3.1 Gen 1) is 500 MB/s, USB 3.1 SuperSpeed+ (aka USB 3.1 Gen 2) is 1.212 GB/s, USB 3.2 SuperSpeed+[66] (aka USB 3.2 Gen 2×2) is 2.424 GB/s, USB4 Gen 3×2 is 4.8 GB/s, USB4 Gen 4×2 is 9.6 GB/s. These values taken from: https://en.wikipedia.org/wiki/List_of_interface_bit_rates#Peripheral I would hope the device driver can detect the max capability of a channel, i.e., most usb-a to usb-c cables are only wired for usb 2.0 speeds. Can the driver detect usb 3.0 speed cables? usb 3.1 cables?, etc.
Thanks for the idea. You might be able to use System Monitor widgets to cobble together something like this. Beyond that, a dedicated Plasma widget for it is out of scope, but represents a promising 3rd-party development opportunity. :)