That AV extension is the same thing we put in Mouse's, and the port that keeps corrupting flash drives. I'm hoping it's borked (maybe while pulling the center console as it was installed in the rear cigarette lighter hole) rather than something with the built in USB on the Avin 4 itself. It always worked with the Avin 2 though so I'm not holding my breath.

Mouse still needs to pull the head unit and plug a USB directly in to test.

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2005 X5 4.4i Build 04/05 Maintenance/Build Log
Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles)

2006 X5 4.8is Build 11/05 Maintenance/Build Log
Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles)

2010 X5 35d Build 02/10
Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles)