MEGA USB-Locker
Security Tool
MEGA USB-Locker is a lightweight Windows batch utility designed to protect sensitive files on USB drives at a time when losing a USB stick at university or elsewhere meant exposing personal data.
The tool creates a password-protected folder on the USB drive and disguises it as a Windows Control Panel system folder using a special CLSID. When locked, the folder is renamed and marked with hidden and system attributes, making it invisible to casual browsing.
Users run the batch script to lock or unlock the folder by entering a password. Failed attempts trigger warnings, and after multiple failures, the script can lock out further access. The entire tool is portable, running directly from the USB without installation.
Built during the pre-cloud era when USB drives were essential for carrying files between home and school, MEGA USB-Locker provided a simple yet effective way to secure documents, projects, and personal data against unauthorized access if the drive was lost or borrowed.