How about getting a clue about what you’re talking about before you post nonsense.
Rockbox will report the same file sizes as the original firmware.
It’s possible the OP ripped the songs to .wav–which can be 10 times largers than mp3 files–and that’s why they’re so big. Changing the Rip settings in WMP to mp3 at 320 kpbs, getting rid of the old files and ripping again would help.
