When I download one of the games from the instant collection, will I be able to download it again if I delete it from my hard drive even after it has expired?

I have an old, fat PS3 and my hard drive space is not too great, so I need to be economical about how I download games!

Yes you should be able to. It would be in your "purchased" history where you can download anything you need again.

Do you mean PS+ expiring? You cannot redownload or access any games that were gotten for free via PS+ after a subscription expires. If the game was simply discounted and not free or if the PS+ sub hasn't expired, then one can download any game that was obtained while a PS+ sub was active.

No, not when PS+ expires. When the free game expires from the instant collection.@Lava said:

Yes you should be able to. It would be in your "purchased" history where you can download anything you need again.

Awesome, thanks!

a lot of people just download everything when available then cancel the download. It is still added to your history.

^That's a great tip. My PS3 is fairly far from my wireless router so full game downloads take a long time to download.

On a side note, my Saint's Row 2 download finished and holy shit this is a fun game!