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How to Encrypt any File, Folder, or Drive on Your System


Encrypting files, folders, and drives on your computer means that no one else can make sense of the data they contain without a particular decryption key—which in most cases is a password known only to you.

So while someone could get at your files if they know your password (the decryption key), they won’t be able to take out a drive from your system and access what’s on it, or use a second computer to read your data—it ‘ll all be gibberish. It means that if your Windows or macOS machine gets lost or stolen, you don’t have to worry about someone using the data on it.

How the most popular operating systems have handled encryption has changed over the years, and there are third-party tools that give you more encryption options to choose from. We’ll guide you through everything you need to know about these options to help you choose the right one.

Built-in Options for Windows

Device encryption is available in the Home versions of Windows.

Windows via David Nield

Encryption on Windows is a little more complicated than perhaps it should be. First of all, there are differences between the Windows Home and Windows Pro editions: Pro users get a powerful tool called BitLocker for encryption, but with the Home edition, there’s a more basic alternative. It’s simply referred to as device encryption, and you can find it by choosing Privacy & security and then Device encryption from the Settings panel in Windows.

Not so fast though, as this option won’t appear for everyone: It requires a certain level of hardware security support from your desktop or laptop computer. It’s all rather complex, and we don’t have room to go into everything in detail here, but The Windows Club has an excellent explainer. If you search the Start menu for a tool called “system information,” then right-click and run it as an administrator, you can see why your computer does or doesn’t support this feature via the Device Encryption Support entry.

Assuming your hardware does meet all of the requirements, and the Device encryption entry is visible, you can click through it to see if your system drives are encrypted—they should be, by default, if you log in to your computer with a Microsoft account. It means that anyone who accesses your hard drives without that authorization won’t be able to see the data on them, because it’ll be encrypted and protected. If encryption isn’t enabled for whatever reason, you can turn the toggle switch to Mr.

When it comes to external drives and USB sticks, if you have the Pro version of Windows you can use BitLocker: Just right-click on the drive in File Explorer, pick Show more options and Turn on BitLocker, and set a password. For those on the Home edition though, this option isn’t available—you’re going to have to use a third-party tool for the job of encrypting external drives, and we’ll get to those later on in this article.

Built-in Options for macOS

Use FileVault for maximum protection on a Mac.

Apple via David Nield

Encryption on macOS isn’t quite as confusing as it is on Windows, but it still needs some explaining. If you have a Mac with a T2 security chip or Apple silicon inside (so one from late 2017 or later), then the contents of your system disk are encrypted by default. Your account password is required to get into the computer and at all of the data secured on the drive.



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