goto, I posted a reply earlier about mounting the drive through UUID or /dev/sdxx manually instead of letting fuse/gvfs handle it. Have you tried that? my speeds increased tremendously after that. You said you thought "the USB" was broken so you replaced it. That is very vague, what did you replace? My guess is that it is a motherboard/chipset issue. I would try a different system board if manually mounting using the mount command does not work.
goto, I posted a reply earlier about mounting the drive through UUID or /dev/sdxx manually instead of letting fuse/gvfs handle it. Have you tried that? my speeds increased tremendously after that. You said you thought "the USB" was broken so you replaced it. That is very vague, what did you replace? My guess is that it is a motherboard/chipset issue. I would try a different system board if manually mounting using the mount command does not work.