this thing kinda pissed me off last night
i was at a fest and needed an extra recorder, wasnt planning on using it and grabbed it out of my backpack. i had the sd card out and internal memory was close to full... it filled up the internal memory and stopped recording.... heck if i could figure out how to delete music off of there from the device itself. was trying to just delete a whole artist as i dumped a bunch of summer phish flacs on there. While you can delete individual files it wasnt intuitive how to delete whole artists or albums. I gave up and trekked back to home base to grab an sd card out of another recorder, and lost more than i should
now after experimenting at home in a calmer environment i know to get there
go to music>artists>'phish'>'all phish'>(it takes you to a long list of all tracks tagged with that artist)>select any one track>'Option' button>'delete all in list'