Can r4sdhc software work on r4v2?

The r4sdhc software is specifically designed for R4 SDHC cards, while the R4 v2 card typically uses different firmware. While there might be some compatibility in certain cases, it is not guaranteed that r4sdhc software will work effectively on an R4 v2 card. It's best to use the firmware specifically intended for your card model to ensure proper functionality.