Because the file ends in .001 , it is the of a split archive. You cannot open it as a standalone file; you must have all subsequent parts ( .002 , .003 , etc.) present in the same directory.
Includes system firmware for everything from classic 8-bit consoles to modern high-end systems (PS2, Switch, WiiU, etc.). Full.Bios.Retrobat.7.0.0-MS. 7z.001
: Move the contents of the extracted bios folder into \RetroBat\bios\ . Because the file ends in
Open the bios folder within RetroBat. Drag and drop the contents of your extracted archive directly into this folder. Because the file ends in .001
