How to exactly save in this game my entire 2 or 3 hours of play has gone

[DemosKratos]

please any solution ?

[VisciousFishes]

You need to use the codec by pressing select button on your controller or equivalent button on keyboard. Once the codec screen pops up, press down on the controller to find "Rose" (in plant) or Otacon (in the Tanker.)

Another way is to dial the number 140.96 into the codec which will take you to either Rose (plant) or Otacon (tanker). You will then be offered the chance to save.

As a "general fyi" when playing either MGS 1, 2, or 3, your save frequency on the codec will ALWAYS be 140.96 regardless of which game you are playing. This is a staple of the series.