Wad Manager 1.8 Page

Removes previously installed WADs from the NAND. This is critical for cleaning up broken channels or freeing space.

Use with extreme caution. WAD Manager writes directly to the Wii's NAND memory. Installing incorrect, corrupted, or mismatched system files (such as a System Menu for a different region, known as "bricking") can render the Wii inoperable. Wad Manager 1.8

Because of these risks, the standard practice in 2010-2012 was to never launch Wad Manager 1.8 without BootMii installed as boot2. If a brick occurred, users could restore a NAND backup using BootMii. Without it, a brick was permanent. Removes previously installed WADs from the NAND

Before understanding the manager, one must understand the package. A WAD (officially standing for "Wii ARchive" or "Wii Application Data") is a packaged file containing data that can be installed to the Wii’s internal NAND flash memory. These files typically include: WAD Manager writes directly to the Wii's NAND memory

While functional for its time, Wad Manager 1.8 is now considered obsolete and risky by modern standards.