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Windows reports High-Speed (480 Mbps) for a USB device negotiated at 10 Gbps - a 20x understatement from the ioctl every USB tool uses - while separately computing a this-could-go-faster bit no UI shows. usbspeed reads both and flags devices running below capability. Zero dependencies, read-only.
Analyze, benchmark and diagnose USB storage devices on Linux: PyQt6 GUI for lsusb -t, hdparm, dd, fio and smartctl, with plain-language results and an illustrated guide to spotting real SuperSpeed (SS) USB 3.x ports. English and Spanish.