Create each loading folder
For PC version, { Game Folder/SpatialErotica_Data/CustomData/}
For MetaQuest package version, {Android/Data/com.AhrpuXR.SpatialErotica/files/ CustomData/}
Under this, folders are generated for each type. (If it is not generated, launch the game once.)
Create a folder under it with any name you like and put the files in it.
There is no limit to the number of folders.
Folders A, B, and C can be deleted or renamed.