USB Block - Version 1.7.6 USB Block lets you restrict data duplication to USB Ports, Flash Disks and External Drives. You can use only the trusted known devices by whitelisting them and blocking all the remaining untrusted devices. You can protect your files from directly being burned to CDs/DVDs that you do not trust and thus prevent illegal copy of your personal files and folder. USB Block works on 32-Bit and 64-bit versions of Windows 10, 8, 7, XP.