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为了满足玩家在非官方渠道（如自制系统、模拟器）上游戏，许多游戏被制作成（光盘镜像文件）格式。然而，ISO体积较大，占空间，因此一种更高效、专为Wii USB存储设备设计的文件系统应运而生，它就是 WBFS ——全称Wii Backup File System（Wii备份文件系统）。
To play custom community editions or backups on original Wii hardware, the console must be modified to run homebrew software. 1. Softmodding the Console
The Wii's USB ports rely on older USB 2.0 tech. Using high-quality external hard drives with dedicated power sources or trusted SD cards yields better loading times and smoother video playback than cheap flash drives.