What is the best format for the Soundfly to use (NTFS, FAT32, etc.)? John September 29, 2018 10:56 Updated Follow Any drive connected to the Soundfly AUX should be formatted under FAT32. Related articles What is the best way to store MP3 on the the SD card / USB Stick to get the maximum number of tracks? If i was to save each CD in its own folder am i right in thinking i could only have 99 CD's on each SD card or USB stick? How long is the transmission range? 50 meters, 1km? Instruction Guide User Manual What is the difference between this model and the Soundfly AUX FM Transmitter? Comments 0 comments Please sign in to leave a comment.