I have a problem with my gotek drive and few generic USB sticks. All my NONAME sticks do not work at all and are USB 2.0 (work fine on PC)
The only one I got to recognize is LEXAR brand.
So you can see that not all USB sticks are created equal.
And on another note, I have a problem with USB 3.0 portable HD with my PS3, so it looks like the new USB standard is not that backwards compatible.