otvori.7z: Use this if you are referring to a specific instance of that file (e.g., "Please extract the otvori.7z archive").
The proper article for "" depends on whether you are referring to the file itself or the action it represents:
otvori.7z: Use this if you are treating the filename as a noun. Since "otvori" begins with a vowel sound (the letter 'o'), "an" is the correct indefinite article (e.g., "I received an otvori.7z file").
otvori.7z: Use this if you are referring to a specific instance of that file (e.g., "Please extract the otvori.7z archive").
The proper article for "" depends on whether you are referring to the file itself or the action it represents:
otvori.7z: Use this if you are treating the filename as a noun. Since "otvori" begins with a vowel sound (the letter 'o'), "an" is the correct indefinite article (e.g., "I received an otvori.7z file").