Place the USB drive with the unzipped files into the keyboard's USB jack. From the main screen, press the button next to the Multi-Pad, then tab to the USB drive. If you wish, you can play them directly from the USB, or import them all to the hard drive by pressing Copy/All/OK, then tab to the HD and press Paste.
Hope this helps,
Gary
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)