Music files (mp3's) stored on MicroSD cards do not play smoothly on my SP3 i7. The music pauses momentarily every 15 sec or so when it is played directly from the card plugged into the computer. The same files play fine when the card is read through an external USB card reader or when the file is copied directly to the main flash memory. This suggests the read speed of microSD interface is not keeping up with the music. Anyone else seeing this?