A recording medium of an image recording apparatus such as a digital camera is divided into multiple partitions, for each of which an access key such as a password is set to provide access security on a per-partition basis. The metal complex has a structure in which a nitrogen atom in a 6- to 8-membered non-aromatic cyclic group is bonded to a metal atom. The resilient finger springs act to engage and hold a second conductor, thus making the electrical connection.