I have solved most issues but am really getting frustrated with Engine. I have transferred my Serato Library to Engine as Denon has instructed us through their site but when transferring the crates from Engine to either a USB stick or SDD which have both been formatted to EXFAT some Mp3’s do not pack to the drives and you have to remove the songs from the collection entirely. This is really frustrating as the mp3’s are fine with all other software. Please help !!!