What is .one files?

.ONE files are associated with Microsoft OneNote. They serve as the primary file format for storing OneNote notebooks. Here's a breakdown:

• Purpose: A .ONE file stores individual sections within a OneNote notebook. A single notebook can be comprised of multiple .ONE files, each representing a section.

• Content: These files contain a wide range of information, including text, images, handwritten notes, audio recordings, video clips, and embedded files. They essentially hold all the data for a particular section in your notebook.

• Structure: The internal structure is proprietary to Microsoft, but it's designed for efficient storage and retrieval of the diverse content types OneNote supports. They use a hierarchical structure to organize pages and subpages within the section.

• Related Files: A complete OneNote notebook consists of a folder containing multiple .ONE files (representing sections) and a .ONETOC2 or .ONETOC file (the notebook's table of contents). The .ONETOC2 or .ONETOC file keeps track of all the sections (.ONE files) and their order within the notebook. More recent versions of OneNote use the .ONETOC2 format.

• Opening: .ONE files are opened and edited using Microsoft OneNote application. You cannot directly open and edit these files with other programs, such as text editors, because of the proprietary format.

• Syncing: OneNote uses .ONE files to synchronize your notes across different devices via Microsoft's cloud services.