Yes FLAC and 10,000 isn’t that much. I also have an iPod Classic 6th gen and I love it, but the mechanical hard drive had to go, it eventually slowed down and made noise sometimes. The SD card mod made it way better, lighter, battery lasts longer, transferring songs also seems faster. If it weren’t for the 10k sound limitation I would be more than happy with it, no need for Bluetooth.