Backups are the best. They're a great way to make sure you can recover your data if something goes wrong, and they're also just a good idea, in general, to make sure you have a copy of everything in case something happens to your computer or other devices. But what if you already have a backup? When should you keep the backup, and when should you delete it? How do you know whether or not your backup is still needed? The answer is simple: just look for .bak files! Many different software systems use these files for backups and duplicates of other files, so it's easy to tell if you've got one by looking at the extension of their filename. In the world of software, there's a standard format used by many different types of software systems. It's called Word, and it's just one of the many tools that we have in our toolbox. With Word, you can create documents that look great, are easy to read and understand, and can be distributed to others in all kinds of formats. .Bak files are a great way to back up your files, but they can have some drawbacks. When looking to back up your files, .bak files are a great option. But you should be aware of their imperfections, too. The most common problem with .bak files is that they lead to "hard drive bloat". This happens when there are so many duplicate files that it takes up too much storage space on your computer. Another issue is that users can't tell what type of file they are by looking at the name alone. That's why three-character extensions on files are unique for every single file format—it makes it easier to find what you need. Backup strategies that rely on generic names can make finding the suitable file difficult, especially if you don't know what kind of document or video it is or even if it's an executable program or something else entirely!