A method, implemented by a router device, for guiding a user in establishing access privileges for a data exchanger includes causing the data exchanger to establish a remote link with a data service provider. In addition, use as a write or read region a specified region of the recording medium which is greater than or equal to a unitary data size being handled during error correction processing to be performed when writing or reading image information on or out of said recording medium. This product can be stored at ambient temperatures for extended periods of time and can also be whipped and displayed at ambient temperatures. The range of movement between the cradle plate and the connector spinal plate is between \u03c31-\u03c32, or between 105\xb0 and 125\xb0.