How to Open a .Data File
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A .data file, sometimes also called a .dat file, is a file containing pertinent information about a program or another file. You don't need a special program to read a .data file -- Notepad, Windows operating system's built-in miniature word processor, can open a .data file, and also gives you the ability to edit the file.
Step 1
Click the "Start" button.
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Step 2
Type "Notepad" into the search bar at the bottom of the screen.
Step 3
Click on "Notepad" in the search results under "Programs." Notepad opens up.
Step 4
Click "File," then "Open." Find the folder where the .data file is located, click on the file and click "Open." The .data file is now readable in Notepad.