I also have a DA-3000 and can vouch for its ease of use and quality of transcription. It has two quirks you should be aware of. First, it only supports a maximum storage medium size of 64GB on USB drives and 32GB on SD cards. Second, you will have to manually index tracks. The auto-index by 2 seconds of silence isn’t as reliable as you might like and can’t handle transitional tracks at all. The index by time inserts an annoying "beep" to signal the interval and that can’t be defeated. Note the manual index can be done after the fact or during playback via the remote. FWIW, I usually index after the fact and use an external keyboard to input track data.
Good luck & happy listening!