The amount of RAM a computer can have is limited by the motherboard (something like 12 GB is reasonable), and the hard drive space is limited by how large they make them (something around 1,500 GB per connection available on the motherboard is reasonable)
Usally in an average computer now days, probably 160 GB on the hard drie and 1 GB in RAM.
It depends on the hard drive. A computer can hold as many gigabytes as its hard drive can handle.
That depends on what computer. They vary FAR too greatly to give an average.
Use 500 GB for a typical computer, and 200 GB for a laptop.
1024
There are 1024 megabites in 1 gigabite. 20 gigabites has 20,480 megabites.
It depends on how many gigabites it has like 8 gigabites can hold about 15 movies.
5500
4,000,000,000
None
4500
1.306728 gb
100
A lot.
a half
It's about 652 Megabytes. Or, 0.652GB