My old MP3 Player has served me well.
I really enjoyed the aluminum case and sturdy buttons. It was able to take a fair bit of damage. The AAA battery also works really well for changing out a spare battery on the fly (and rechargables).
However it is getting a bit old and worn down. I've had to replace the glass screen cover with a plastic piece I cut to the same size. I had to poke a hole in the battery cover and put in a shaped piece of paper-clip to keep the cover on.
It also only has a 1Gig capacity and does not play the all the audio formats.
So I'll need a new player.
It must have:
Drag and Drop for Files
Be very sturdy and Robust
Must NOT have:
Standard battery power (AAA)
Capacity only looking for a few gigs. Would prefer Flash memory.