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uh, the HDMI port on a PC is for video output only.
USB is a data port. the 2 have different purposes.
Spock (rhp)
no. HDMI is output only on computers for graphics.
Anonymous
No. A drive (as opposed to a player) cannot be connected via HDMI. A standalone player has to read the exact same data as a drive, so it's physically impossible for it to provide better quality.
Bort
Probably not. HDMI isn't any faster of a connection than USB.