When you talk about space on your HDD. Why? Because you can delete the installation data of the game from out of your "Game Data" map, when you're not intending to play the game for a while. Since Game Data only saves the installation of your game and not your saving progress. You can play the game further, after of course the necessary installations... if.... you 'DON'T' remove your save data from out of the Saved Data Utility! Since save data only take about a few MB, there's nothing to worry about lost space, now is it?
I've tested it myself with several games, and it works fine. Maybe everyone is already familiar with this option, though I've noticed many people are not.
PLAYSTATION®3 is the future.....NOW.......B_E_L_I_E_V_E
Supporter of PlayStation and Nintendo
