I have a f900bt and i have a 16gb flash drive, and its shown up twice, im not sure if its something im doing wrong or what? every other time i plug in the drive, the usb icon stays greyed out. if any one knows how to fix this issue PLEASE let me know.

What happens when you plug it in? Does your flash drive have an LED light on it? Does it light up to indicate that it's working? How long do you wait before you decide it's not working?

when i plug it in, it lights up and flashes like its transfering data. ive left it in for a long time just flashing and nothing. BUT i actually called pioneer customer care and they told me that the f series is only able to support up to a 4gb flash drive. so i returned my 16 and got a 4 and it works flawlessly!

thanks for the reply!

FYI...I am using 16 Gb Flash drive with my F-700-no complains so far.

The only issue I got with the Flash drive is that I have to reattach it every time when I start the HU.

The HU does not recognize it after the reboot.