Discover how using plain text files with the PARA folder system can simplify note-taking across devices, without the overhead ...

The Windows operating system uses the file extension to understand how to open a file. For example, when you double-click to open a TXT file, Notepad probably opens it.

How to open a .csv file in Excel Opening a .csv file is as easy as opening a .txt file, and usually, you won’t have to clean up the data before doing so because the save task inserts the delimiter.

Learn how to use a Microsoft 365 setting to choose whether to open files in the online or desktop app, giving you full control for each file.

File search: You can now find, open and ask questions about the contents of a file on your device from the Copilot on Windows app.