Windows 11 Home doesn't support BitLocker so you won't have encryption enabled there. (You can circumvent this with tools like Rufus, if you want, though that's obviously not an official solution as it allows users to bypass the Microsoft's intent.) If you bought a prebuilt PC with Windows 11 Pro, there's a good chance software BitLocker is enabled on it right now. While many SSDs come with hardware-based encryption, which does all the processing directly on the drive, Windows 11 Pro force-enables the software version of BitLocker during installation, without providing a clear way to opt out. According to our tests, random writes and reads - which affect the overall performance of your PC - get hurt the most, but even large sequential transfers are affected. Unfortunately, a default setting in Windows 11 Pro, having its software BitLocker encryption enabled, could rob as much as 45 percent of the speed from your SSD as it forces your processor to encrypt and decrypt everything. Pick your password, then click Erase, and the drive is ready to go.There are few things more frustrating than paying for high-speed PC components and then leaving performance on the table because software slows your system down. Give the drive a name, choose an encrypted option under Format (the options are explained here) and choose GUID Partition Map under Scheme. If the encryption option doesn't appear, the drive needs to be wiped and reformatted to be compatible-open the Disk Utility tool in macOS, click View and Show All Devices, then select the relevant external drive and click Erase. You can encrypt external drives with a password from Finder: Just right-click on them and choose Encrypt. You'll also need to specify your preferred way of unlocking the system disk if you ever forget your password, either through iCloud or through a dedicated recovery key. There's a FileVault option there, together with some details about what it does. You can also turn FileVault on (or off) whenever you like by opening the Apple menu and choosing System Settings then Privacy & Security. You'll be asked to enable FileVault when you first set up macOS on a new machine, and it's something we'd recommend.
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