FilesizeUp to Glossary
This Definition applies to: Any version.
The term filesize refers to how big a particular file is in terms of bytes.
Filesizes are expressed in terms of bytes, which are a unit of measure in the world of computers. A single byte is rather small, but most files are much larger. We express 1000 bytes as a kilobyte, and a million bytes as a megabyteYou can make an analogy with filesize to the weight of a physical object. Something that weighs 15 pounds obviously isn't as hard to lift as something that weights 15 tons. The same is true of filesizes, especially in an online context.
A file that is 15 kilobytes takes much less computing power, and load on your internet connection, than a 15 megabyte file would.