Systems, methods, and apparatus related to transferring encrypted data over a wireless network. In one approach, an encryptor includes a host interface configured to transmit data and commands with a local computing device, a wireless communication interface configured to transmit data and commands over a radio access network, a storage interface configured to interface a local storage medium to store data, and at least one processing device configured to perform operations comprising: encrypting first data from the local computing device to be written into the local storage medium upon receiving a first command from the local computing device; decrypting the encrypted first data from the local storage medium to be read by the local computing device upon receiving a second command from the local computing device; and transmitting the encrypted first data through the wireless communication interface to the radio access network upon receiving a third command.