Purchased a brand new Samsung EVO 64GB SDXC UHS-1 Card for REDNAND. Formatted to FAT32, No issues in multiple PCs, but the Wii U keeps throwing a SD Mount Failed error trying to load HBL. I've used multiple Partitioning and formatting tools (Panasonic, GUIFormat, MiniTool, etc). Still no dice. What am i missing? EDIT: Ugh, NOW it works. Redid everything from scratch *again*, triple checked everything. panasonic tool for initial format, then Minitool Partition manager to create the new partition, then copy the files over. it worked, this time. Nevermind.