I have a USB thumb drive plugged into the Pi. It's a USB3 drive but I know that the Pi is only USB2, so I'm expecting speeds to be in the average 35-40MB/s range.
However, what I'm getting is only around 15MB/s, which I determined by using
hdparm -tT. My sdcard gives me
20MB/s. Is there any way to increase the I/O performance of the USB drive?