What is it meant by a gigabyte and a terabyte of a computer memory?

A gigabyte (GB) and a terabyte (TB) are units of digital information storage capacity. One gigabyte is equivalent to 1,024 megabytes, while one terabyte equals 1,024 gigabytes, making a terabyte 1,048,576 megabytes. These measurements help quantify the amount of data that can be stored on devices like hard drives, SSDs, and memory cards, with terabytes representing significantly larger storage capacity than gigabytes.