A security module for a removable disk drive having a lockable hardware write protect feature for use with docking base. Additional features provided by the invention are an enclosure and electrical connection interface designed to reduce or eliminate radio frequency interference (RFI) and electromagnetic interference (EMI), a removal mechanism that provides for orderly powering down of a disk drive before removal of the security module from a docking base, and a module latching and lock mechanism that provides for positive, lockable securement of the module into a docking base.