How-To Geek: How to Recover a Deleted File: The Ultimate Guide. “It’s happened to most of us. You delete a file, and then realize you need it back. This guide explains when you can get that file back and how to go about it. We’ve covered a variety of tools for recovering deleted files in the past, but this guide goes more in-depth. We’ll cover everything you need to know if you want to successfully recover deleted files.” Very extensive. Some of the strategies are definitely not for beginners.