Onkyo TX-NR545 Manual page 10

3. Select "USB" with the cursors and press ENTER.
If the "USB" indicator on the display flashes, check whether the USB
storage device is plugged in properly.
Do not unplug the USB storage device while "Connecting..." is on the
display. This may cause data corruption or malfunction.
4. Press ENTER again in the next screen. The list of folders and music files
on the USB storage device are displayed. Select the folder with the
cursors and press ENTER to confirm your selection.
5. With the cursors, select the music file to play, and then press ENTER or
to start playback.
The USB port of this unit conforms with the USB 1.1 standard. The
transfer speed may be insufficient for some content you play, which
may cause some interruption in sound.