Hi, I tried to ask in a different thread but did not get any response, maybe I will have more luck here
When playing a CD and pressing a number on the remote, like 5 or 6, I would expect the player to jump to the track with this number, as with other CD or DVD players that I had, but it does not happen. Is it normal? If yes, it is a very incovenient thing, and probably could be corrected by firmware.
I also have problem with a USB HDD 500 MB PQI, most of the times after connecting the Panny says either no USB device connected or incompatible USB disc, I am going to try a solution by Shaka from a different forum:
"Problem solved! Last night I disconnected everything from the unit, including the power cable, and left it like this overnight.
Re-connected everything back and it now detects the USB and plays all media from it."
Like good old times with Windows computer

It may have something to do with HDD power supply, perhaps different discs have different requirements? HDD did not start immediately even after plugging into Yamaha AVR.