do you know if it is the usb 3.0, 3.1, or 3.2
It seems that after the original usb3.0 version they seem to slow down after writing and never seem to recover on their own. I have reformatted a 3.1 every now and then to recover performance for a short bit of writing. My original usb3.0 just takes names when doing work and never had an issue out of it