Computer system, external storage, converter system, and recording medium for converting a serial command and data standard to a parallel one

An external storage accessed by a computer, comprising:

• conversion means configured to be connectable to a serial communication terminal of the computer and including a ROM storing a program for receiving a first command and data based on a first standard supplied from said computer and converting the received command and data into a second command and data based on a second standard different from said first standard said conversion means automatically converting the first command and data into the second command and data under control of said program stored in said ROM;
• and
• access means for controlling access to a storage medium removably connected to said conversion means according to the second command and data supplied from said conversion means.

A recording medium for storing a program including an instruction for instructing a processor to convert a command based on a USB (Universal Serial Bus) standard into a command based on an ATA (AT Attachment) standard, an instruction for instructing the processor to respond to a command based on the USB standard, an instruction for instructing the processor to convert data of a format based on the USB standard into data of a format based on the ATA standard, an instruction for instructing the processor to convert data of the format based on the ATA standard into data of the format based on the USB standard.