4GB SD and MMC yes, >=4 GB SDHC not without SDHC patched kernel but such patch is not a problem. I have actually bought 4GB SDHC mini card for this mod to make and test such SDHC patched kernel. Otherwise plain SD (i.e. not HC) would be better choice for 4GB size. Thanks for your tips for opening the case, not sure when I'll have next window of opportunity for this mod but I hope it will be easier next time thanks to the info you provided.