500mb lmao. are you trying to upload "Gone with the wind?"
as you are on shared hosting, remember that your host will drop your site in a heart beat if you abuse their limits.

All shared hosting sells:
Unlimited Bandwidth: (meaning you dont know the limits we allow you)
Unlimited disk space: (meaning you dont get told what we'll allow you)
Unlimited Email accounts: (meaning, if we get just 1 spam report you'll get your ass banned)
24/7 chat support: ( meaning, the baboon you talk see more to has no idea what a CPU is, and thinks a RAM chip, is when a goat butted your paintwork on your car, but the Baboon would do well with the crayons and colouring book, if we can just get him to stop eating the crayons.)