$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
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Summary
You can now upgrade your Wii U from an 8GB or 32GB internal storage to more than a TB with this SSD kit. You'll have to install the Aroma custom firmware on your console to use it, though.