I've tried every card from 64MB (from the darkest crags of my closet) all the way up to the 64GB ones that work in every other Avic deck I have (I know I know, they don't work, they're unstable when you format them for fat, but this problem isn't specific to any card brand, size, or format). I did a 14,000mi road trip watching a number of shows completely on the 64GB cards in 2013, this problem seems to only happen since I swapped out my z150BH for the 8000NEX, and even then, it's only happening as of the newest update for the deck. I also have a TON of 32gb cards of differing manufacturers.