File extensions are usually three, four or more characters after the dot at the end of file names. They define the file type. In expenses.xlsx, the xlsx extension means it is an Excel file.
Windows ...
File extensions are usually three, four or more characters after the dot at the end of file names. They define the file type. In expenses.xlsx, the xlsx extension means it is an Excel file.
Windows uses the extension to determine which program opens a file when you double-click it. You can manually change a file’s extension, but this changes what program opens it.
File-Extensions.org has a large library explaining many file types. It links to software to open or convert files. The site covers what file extensions are and how to view them in Windows.
CHU files are used by BioWare games. To open them, associate CHU files with the right software. See the list of programs that support CHU files.
A filename extension indicates the file contents or use. It is typically separated by a dot. Some systems use spaces. You can show or hide extensions in Windows. Showing them prevents opening malicious files incorrectly.
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