Not a lot of people do it, because they don't know what firmware is. Usually firmware updates help by solving problems with mp3 player, such as freezing in the middle of the song, wierd clicks or pops during play play, add new functions, etc. Go to the manufacturer's website and go to the support or downloads link and you should be able to find any firmware updates for your mp3 player. However, by aware that sometimes a firmware update will wipe your player clean, restoring it to it's factory default state.
How many ppl. do this? Shud i do it? Are there any cons for updating (i.e. like taking up space/memory).

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