Limit USB drives, external devices and ports on your computer to prevent data leakage. You can whitelist your portable drives and block the rest. USB Block blocks data leaks from devices such as USB drives, mobile phones, tablets and other devices attached to your computer. It can even block certain ports and partitions. You can whitelist trusted device. You can then copy data onto your own USB drives, external drives, iPhones or Android phones, but prevent other devices from gaining access to your PC. This feature allows you to check if someone has attempted to hack USB Block using incorrect passwords. All incorrect passwords are logged in order to monitor any suspicious activities. By blocking access to files, folders and drives, you can protect your data against unwanted access. Windows kernel-level filtering and locking driver allows you to lock folders and files in Windows.