Your operating system can take up quite a bit of space, music and videos may also soak up quite a bit of memory. Consider investing in an external hard drive if you are having space issues on your computer.
It uses Hard Drive
That is impossible to know without having access to your computer. Everybody uses varying amounts of space.
This happens automatically when you run out of RAM. This is the reason Game's advice at least 10GB space free on your Hard Drive. The PC uses the RAM and Cache, then the Hard Drive, then you'll get Blue Screen of Death Memory Dump.
The page file is a part of your system's virtual memory that uses hard drive space to supplement memory. Sources: http://en.wikipedia.org/wiki/Virtual_memory http://en.wikipedia.org/wiki/Paging
Hard drive space has no direct correlation to memory usage. It is quite possible for a program that occupies little space to use a large amount of RAM, and it is also possible for a program that uses a large amount of space to use very little RAM.
That would be a solid state hard drive, or SSHD.
Your computer will have more issues when you hard rive is near full as it uses something called virtual memory. This memory is really hard drive space that the systems uses like CPU memory. The computer will be spending more time looking around your drive and finding space then doing work you want. Two ways to cure this is to get a larger drive or more memory.
A 500GB hard drive can hold 500GB of data (although in reality slightly less is available for use as the formatting of the disc uses some space). This equates to around 800 albums (in mp3 format), or 150 movies, or 10,000 photographs or any combination of such files.
Yes, and no. It does because of the space it uses up on your computer, just like any other program you were to get. And no, because it's just like getting a different game, it uses up space on your Hard Drive.
Virtual Memory is using the Hard Drive as if it were RAM. Cache is memory for frequently used things and is not stored on the hard drive.
Hybrid hard drive
When choosing an external hard drive first consider how much capacity you are going to need. Generally a 1 terabyte external hard drive is more than enough space for the average consumer. Also check which type of connectivity the external hard drive uses. USB 2.0 is the usual standard, some hard drives can connect via Firewire (if your computer has the port) which is generally faster than USB. It's also wise to choose an external hard drive with some sort of warranty as some can unfortunately be defective, so it pays to have a warranty handy.