And why there are directories XMZ, XSZ and XLZ and NOT XIZ???
It is very confusing and causes to ask stupid questions 
“xiz” files are the instrument (preset) format for ZynAddSubFX. You can upload this type of file on any directory and you can create directories from the webconf tool.
Anyway, you are right! currently it’s quite confusing and i will work for improving it ASAP 
Regards,
3 Likes