Folder

What is a Folder in a Computer?

A folder is a virtual object for organizing other virtual objects, such as files, layers (in image editors), or clips (in video editors). These other objects are organized by place them inside a folder that categorizes them.

Folders are used to organize items when you have too many items. What are these "items" exactly depends on the context. In the file system, those items would be files. In an image editor, those items would be layers. Regardless of context, you'll often be able to place folders inside other folders—which means a folder is one type of item—thus creating a hierarchical folder structure, also called a "tree" structure.

Typically, when we talk about folders, we're talking about folders in a file system. This type of folder is also called a directory (abbreviated "dir"). When you have too many files in your PC, you can organize them by placing them into folders act as categories for the files. For example, you can place all your vacation photos in a folder called "My Vacation Photos." If you had more than two vacations in your entire life, you could have two folders inside that folder (also called subfolders), one for the year 2023, and another the year 2024, for example.

• How to Create a Folder on Windows 11

A brand new computer with an operating system installed in it will already have countless folders, because folders are also a way for the operating system to organize its own files.

In general, a folder in a program is a group of items, where each item can only belong to one group. However, there are also cases where a function of a program uses a folder icon, but actually has a filter function that filters items based on some filter criteria, e.g. "all items that are images." In this case, it's possible for two of these "filters" that look like folders to contain the same items.