A very specific and interesting topic!
You can use specialized software or command-line tools to split the file into two parts: a .wbfs file and a .wbf1 file. 1. Using Wii Backup Manager (Recommended) This is the most automated method for Windows users. super smash bros brawl wbfs split
This splits the file into 4 GB chunks named RSBE01.wbfs , RSBE01.wbf1 , etc. A very specific and interesting topic