An encrypted flash drive would be the best method of securely distributing medical records among the given options. An encrypted flash drive is a portable storage device that uses encryption to protect the data stored on it. Encryption is a process of transforming data into an unreadable form that can only be restored with a key or password. Encryption can prevent unauthorized access or disclosure of sensitive or confidential data, such as medical records, if the flash drive is lost or stolen. An encrypted flash drive can also be used to transfer data between different devices or locations securely. Reference : The Official CompTIA IT Fundamentals (ITF+) Study Guide (FC0-U61), page 203.