Android’s modern storage rules are strict. AetherSX2 often cannot write files stored directly in /storage/emulated/0/ (the root of your internal storage).
: Re-select the BIOS Directory in the app settings rather than trying to "Import" an individual file. This forces the app to request folder-level access. Alternative Solutions aethersx2 failed to write bios image
Take a deep breath, move that BIOS file into a subfolder, grant the right permission, and you’ll be playing Final Fantasy X or God of War II on your lunch break in no time. Android’s modern storage rules are strict