Use built-in folder encryption if your operating system supports it
On Windows, use BitLocker for drives or EFS for files and folders
On macOS, create an encrypted disk image with Disk Utility
On Linux, use encrypted archives or encrypted containers such as VeraCrypt
Use third-party tools like 7-Zip, VeraCrypt, or AxCrypt
Compress the folder into a password-protected archive
Set a strong password with letters, numbers, and symbols
Store the password securely
Enable two-factor authentication on cloud storage if the folder is synced online
Back up the folder before encrypting or locking it
Test access after protection to confirm it works
Keep the encryption software updated