For years I wanted a car stereo with USB port on the front ... it's done! As a bonus, an auxiliary jack and even a CD player for my old records ... Navigating between folders via the USB is fast and simple. I use a key that works perfectly over 16GB (careful to format the key in FAT32 (default) because the NTFS format will not work with the unit). And indeed, reverse the red and yellow son to avoid losing your backups on the job. Pioneer, a brand that keeps its promises and that deserves its reputation!