USB Flash Block/Unblock for Windows

Keep your USB data protected

File-locking is common on desktop systems, but removable drives deserve protection as well. USB Flash Block/Unblock, created by InstallWhat?, provides an extra layer of security for important files stored on USB sticks.

A portable, free replacement: Elgindy USB Protector

Elgindy USB Protector is a recommended alternative that requires no installation — run it straight away. Before launching the tool, make sure your USB drive is connected to the computer so the application can detect it correctly.

Interface overview and modes

When the program starts, a compact window appears with a simple control menu offering three modes. Select the option that fits how you want the drive to behave.

• Read-only (view only): Displays the files on the USB but prevents any changes, including adding new items or copying files out of the drive.
• Disabled (blocked): Renders the USB inaccessible so no operations can be performed on it.
• Normal (full access): Restores standard read/write functionality so you can use the drive as usual.

Saving your selection

After choosing a mode, click the button beneath the options to apply and save the change. The selected state will take effect immediately.