Hello everyone. I have owned my R4 for about 1 month and I purchased a 2Gig MicroSD card to setup my games. Now right now I am at a point where I am going to run out of space. I'm not sure if there is a limit to what the R4 can support. I am thinking of getting a 4Gig or a 8Gig MicroSD.

Does anyone know if the R4 supports these capacities?

It supports up to 4GB of regular SD cards (except you'll only find SDHC cards at 4gb, so 2GB is really the limit.)
You'll have to get a different cart if you want SDHC (4GB+) support.

You can get 4Gb non-SDHC cards. They are rare as hell but WERE actually made for a short period. Failing that, yeh 2Gb would be the limit.

The M3DS Real and CycloDS Evo support SDHC but the R4DS does not.

Wait so the RE Revolution only takes non SDHC cards or only SDHC cards? I looked up some MicroSd Cards and I saw some 4Gig SDHC ones for sale.

Only non-SDHC. My point is that there were non-SDHC 4Gb ones manufactured- so you can find them if you look hard enough.