: Yes. As of version 3.0+ (r1280 and higher), USB Loader GX added the ability to play Wii games directly from an SD card. However, USB is generally faster and more stable. For GameCube games : Yes, Nintendont supports SD cards.
External 2.5" or 3.5" hard drives with external power supplies offer a 99% compatibility rate. usb loader gx compatibility list full
| Game Title | Region | cIOS Slot | Video Mode | Notes | |------------|--------|-----------|------------|-------| | Super Mario Galaxy | All | 249 (56) | Force NTSC (if PAL) | Minor stutter on cutscenes – normal. | | Super Mario Galaxy 2 | All | 250 (57) | Force Progressive | Use 250 for smoother FMVs. | | The Legend of Zelda: Twilight Princess | All | 249 (56) | Disc Default | Perfect. | | The Legend of Zelda: Skyward Sword | All | 249 (56) | Force Progressive | Motion+ works fine. | | Mario Kart Wii | All | 249 (56) | Disc Default | Online works with patched Wiimmfi. | | Super Smash Bros. Brawl | All | 250 (57) | Force NTSC | Dual-layer – use cIOS 250 base 57. | | New Super Mario Bros. Wii | All | 249 (56) | Disc Default | Perfect. | | Donkey Kong Country Returns | All | 249 (56) | Force NTSC | Perfect. | | Metroid Prime Trilogy | All | 250 (57) | Force Progressive | Must launch via individual game selection. | | Xenoblade Chronicles | PAL/NTSC | 250 (57) | Force NTSC (if PAL) | Large game – works best on FAT32 split. | | Wii Sports Resort | All | 249 (56) | Disc Default | Motion+ required. | | Animal Crossing: City Folk | All | 249 (56) | Disc Default | Perfect. | | Mario Party 8 | All | 249 (56) | Disc Default | Perfect. | | Kirby’s Epic Yarn | All | 249 (56) | Force Progressive | Perfect. | | Punch-Out!! | All | 249 (56) | Disc Default | Perfect. | | WarioWare: Smooth Moves | All | 249 (56) | Disc Default | Perfect. | | Resident Evil 4: Wii Edition | All | 250 (57) | Force Progressive | Uses 57 for video streaming. | For GameCube games : Yes, Nintendont supports SD cards
Even with perfect game files, the physical hardware you use is critical for stability. Not all USB drives work well with the Wii's older USB 2.0 controller and custom IOS (cIOS) software. | | Super Mario Galaxy 2 | All
⚠️ Avoid “full list” PDFs from 2011–2015 – they are outdated.