windowscentral[.]com/software-apps/windows-11/how-to-protect-folder-with-password-on-windows-11
We've had several giveaways featuring an encrypted storage pool or folder or drive, and they're also included with several anti virus packages. They all use a VHD [Virtual Hard Disk] that is a single file that, when mounted, pretends to be a real, physical hard disk. VeraCrypt will create that VHD for you as part of the same process you use to encrypts it. This illustrated How-To walks you through doing the same thing using Windows own tools, setting up a VHD [.vhd or .vhdx] & encrypting it with BitLocker.