For decades, the dominant metaphor was the hierarchical folder (a inside a directory inside a drive). This mimics the physical filing cabinet. However, a digital file can only exist in one folder path at a time. What if an invoice belongs under "Taxes," "Q4," and "Client XYZ"?
At its most fundamental level, a is a named collection of data stored on a persistent storage medium, such as a hard drive, solid-state drive (SSD), USB flash drive, or cloud server. Think of it as a digital container that holds information—whether that information is text, an image, a program, or any other kind of binary data. For decades, the dominant metaphor was the hierarchical