Egyszerűbb batch file megoldás, otthoni használatra

How To Password Protect a Folder in Windows 10

https://www.laptopmag.com/articles/password-protect-folder-windows-10
AxCrypt

https://www.axcrypt.net/

AxCrypt makes everything about encryption simple, so you shouldn’t be surprised to learn that it even makes PKI exchange of secure data simple (…) For these reasons, AxCrypt joins CertainSafe as an Editors’ Choice for encryption