I just bought Revalations and found out that I also get The first AC. Cool right? Well, I can't install AC#1 because there is not enough free space on the hard disk.Right now I have 2980 MB / 37 GB left. Any help would be helpful.
You can put any 2.5" SATA 5400rpm laptop hard drive into the PS3, as long as it will fit into the carriage. I upgraded mine to a 500gig hard drive. The first thing you have to do is to back up your data using the Backup Utility to an external hard drive, that is formatted to FAT32. After you've backed up your data you can then upgrade your hard drive. There's detailed instructions on how to upgrade your hard drive here;
As well as in your owner's manual. I wouldn't bother updating a 7200rpm drive, the benefits are minimal if any.
Your PS3 only has a 40GB hard disk (a portion of it is reserved by the system) but you can get a bigger 2.5" hard disk from any computer store. Make sure you get a laptop (2.5") SATA hard disk (not PATA, that's outdated) and then you can screw it in your PS3 to upgrade. Make sure to backup your PS3 data somewhere safe first or you'll lose it.