Now we have tapped into one of my recent discoveries with my Clip Sport.
My best results for tranferring and/or charging occur when I use the micro USB cable that came with the Clip Sport.
I use this cable for connecting to my computer USB port and when I want to charge my device using an AC charger for USB.
Most of the random micro USB cables that I have laying around from other devices do not properly communicate with my Clip Sport. (One micro USB cable that does work came with an old Garmin GPS device).
Maybe you could try using the original SanDisk micro USB cable when you want to charge your Clip Jam using an AC charger?
