Ofc! otherwise i wouldnt be able to use my 64 gig mem card (and i am not even talking about the options! man, what you can do with a rockboxed device.. just TASTY)
i am using only flac format so basically i am really enjoying that rig.
been thinking of doing some custom painting and changing the pads and the cable to a toxic cable, but that will take a little bit more time for me to accomplish