What is 4 gb ram?

4 gigabytes. That about the same as 2000 of those old floppy discs. These days, it's about the size of the RAM you would get in a new computer, the quick, solid state memory that is on a series of chips. For storage, a computer also uses a hard drive. Accessing data on these is slower, but common sizes these days are 2000 gigabytes or 2 terabytes (TB).