Is it 128gb or can it read 256gb? Does the brand matter for quality or speed wise or since the Dreamcast reads/writes slow it probably doesn't matter if I went with a slower read/write to save money? On Walmarts website a seller list that 128gb is the max support. This is just someone selling on Walmarts website so the description might not be accurate. 256gb might work. Does anyone know the answer to my multiple questions? What the max file size is and if brand of the memory card matters for write and read.