Greetings i have a card that takes mirco SDHC cards and it works fine for all files under 256mb, for files of that size the loading freezes about 90 to 95 % through. i have tried sandisk and sandisk ultra 4gb cards and both are the same. the same cart worked fine for these size games with a previous 4gb card but that card has sense bronken in half. i cant buy much online. should i continue to invest in cards or just get a new cart?