memory card for mp3/mp4 player
 

i need advice... my mp3/mp4 player's internal memory has just been filled up and i'm thinking of buying now an external memory card.. mine uses mini SD cards... so what i need to ask you guys is this, .... is it ok to use those 4gb capacity mem cards? will it slow down my player? has anyone of you encountered problems when using 4gb memcards on your players? thx .........