If you want to protect your PDF files and ensure they can only be opened on a specific hard drive or USB drive, you can use hardware-based DRM. One of the most reliable ways to achieve this is by obtaining
VeryPDF DRM USB Portable: The Best Way to Protect PDF Files on USB Devices – The Ultimate Solution for Secure Document Distribution
In a world where data protection is critical, ensuring sensitive PDF documents remain secure while allowing authorized access is more important than ever. VeryPDF DRM USB Portable offers the ultimate solution for securely storing and distributing PDF files on USB