I currently have an R4 III Upgrade Revolution, and have had no problems with my 4GB microsdhc card. I bought a new 16GB card recently, but my flash cart always reads many of the files as corrupted, especially when I have a large amount of files on the card. I figure that this is a limitation of the card itself, due to the large capacity. My question is whether upgrading to a flash cart compatible with a 3DS, such as an R4i gold or an Acekard 2i, would make sense. Is there any problem using these flash carts with a high capacity microsdhc card?