1. A method for detecting malicious content within portable data storage devices, the method comprising: detecting insertion of one or more portable data storage devices into a security appliance, the security appliance being configured to receive the one or more portable data storage devices; receiving from the security appliance, via a communication network, data associated with the one or more portable data storage devices; analyzing the data to determine whether the one or more portable data storage devices store malware; and based on the determination, selectively identifying the one or more portable data storage devices storing the malware.