$21 Nintendo Wii U upgrade lets you add TBs of storage to your console with an M.2 or SATA SSD — upgrade makes console slightly faster, but requires Homebrew and custom firmware
… This upgrade is more for aesthetics, but if you’re willing to accept the risk of or already have homebrew software, then finding a way to have a “permanent” storage upgrade on your Wii U is a no-brainer. …