Ps3 questions on upgrades and specs about ps3 system?

May be...

can i download programs to my ps3 or is there certain programs that i can download to my ps3 and another question what is the biggest hard drive that i can upgrade my ps3 with i have found info that i can upgrade to 320 gigabytes instead of just 160 gigabytes with a bigger 2.5 inch SATA drive so if any body casn answer these questions i am at bonezwiseman@yahoo.com

biggest hard drive is a terrabit. a thousand gigabites. can download any programs iv dont know of any that you cant

Learn to use commas, periods and question marks. Your question is so annoying to read (if it is a question at all).

The largest size is 500GB