Version 1.94.1 is several years old. Free Fire is a live-service game that requires the latest version to connect to official servers; an old modded version likely won't work even if "successfully" installed.
Garena has a strict anti-cheat policy. Using a modified APK will result in a permanent device and account ban . free-fire-battlegrounds-1-94-1-apk-mod-full
Required approximately 61 MB for the APK itself, with an additional ~600 MB+ of OBB (data) files. Version 1
Unofficial files often contain "injectors" or hidden code that can steal personal data, photos, or passwords from your phone. or passwords from your phone.