To start SSMB on USB Loader GX on Wii Backup Manager set split of 4GB instead of auto on WBFS files in NTFS partitions.
It's a bug of USB Loader GX (and other loaders) not Wii Backup Manager.
Affect all Nintendo Wii games over 4GB.
After upgrade to 4.2E..i having IOS202 (for USB 2.0 support on MPlayer CE) have been able to trucha-bug IOS70 (thanks to Dop-IOS MOD v6.0), install cIOS 249 rev14 installer by Waninkoko over 249 stub.
Long-life to IOS202!!!
Wiipower utility need IOS36-64-v3094.wad in the root of SD..no online installation.
Use NUS Downloader, Title ID: 0000000100000024
But..Wiipower utility too (with all patches to yes) it's not enough for full use of AnyTitle_Deleter_MOD.
I may try the new ram site, and download more RAM to my Switch. Not sure if ddr3 is the right ram
for it tho. Edit- no it uses floppy Ram, just like @AncientBoi