I plan to store game comments, descriptions, achievement awards, bonuses, etc.
Thanks for the super quick help. VGameSaveGameName returns 16.1.2015, 0:15h, which doesnt seem to compute?
Actually that is correct. If you specify a text to be used for the save games via the properties tab, you will see that it displays a time stamp (date & time) underneath the generated save game thumbnail.
There's a much simpler way to go about with what you are doing. Use the quick save (autosave) system. On new game add an if query if autosave #0 exists else execute autosave #0. Now this file will only be generated once. Next you need to figure out when to overwrite it. The autosave system is great for setting up a resume/continue function for your game as you can execute (save) it each time you load a new scene, leave a scene, do something important in the game or maybe before or after you access the games menu.
P.S: you could write the data into an external file no problem & read the data on the file at game launch but unless you plan on using encryption for the data (sha-1 or whatever - I forget) then it's not the most secure method as people would simply be able to edit the file & add data into if they know what it is & thus would be able to unlock all achievements, collectibles without batting an eyelid.