Invalid External folder bug

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Android 13 LineageOS Version 1.8

This is OK Android/data/MAME4droid 2024/files/roms

This is a problem Create Games/MAME/ Extract tg16/zips Games/MAME/tg16/zips Exit MAME4droid, nothing happened I remember I "use this folder" Games/MAME/ external storage

Then I create Games/MAME/roms/tg16/zips Useless

"use this folder" Games/MAME/roms external storage It's same

I don't know if it only works for arcade ROMs? Or it doesn't support both of arcade and home console ROMs/folders

If I did something wrong, I have to delete data and games currently because unworkable external storage

Another question extracted APK 383MB Windows installed 501 MB Android why? they're 1000 or 1024? Or you did something make it be huge?