USB spreading malware is still a concern today. Over the past few months, we have witnessed an increase in malicious software exploiting USB drives to bypass security measures, even in air-gapped systems. Whenever we connect our USB drive to an "untrusted" system, numerous doubts arise: what happens behind the scenes? Is something accessing, modifying, or encrypting our files? This is where USBvalve comes in. It is an affordable dongle, built using readily available hardware, designed to reveal the true activities occurring when a USB drive is connected to a system. It can also be used to check for "BADUSB" (HID) on USB keys before inserting them into our own systems. The best part is that it's as compact as a keychain, making it convenient to carry with us at all times!