Questions. I did hardmod Old 3ds Xl. Nand reads fine, but when writing any Nanda (native or patched) throws an error "an error occurred when attempting to write data to handle.Error 21 device is not ready." Interrupts are always 23% when recording. At the very top box wires Connect to your CLK, CMd etc. I checked. Everything is fine. Connect to the memory card, too, is correct. Reader changed on Trantsedent right, too personal. Removable SD card to another to no avail. card reader does not work shifts. short wires. Switch on the SD card in position. What could be the problem?