When you plug a standard USB external hard drive into a Windows 10 PC, the operating system uses a generic driver ( usbstor.sys and UASStor.sys ) that has been perfected over decades. The ECD819 SU3 controller is designed to identify itself as a standard USB mass storage device.
⚠️ Firmware flashing can brick the device if interrupted. Only attempt if you are experienced. ecd819 su3 windows 10 driver
The SU3 is a USB 3.0 device. Sometimes Windows 10 has power management issues with USB 3.0 controllers. When you plug a standard USB external hard