Patent ID: 6965403

Claim:
An external storage device which is connected to an image pickup apparatus provided with a first image storage medium capable of storing plural taken images and image display means, and adapted for backup of image information stored in said first image storage medium, the device comprising: a second image storage medium capable of storing plural image information; a connection detecting unit for detecting the connection with said image pickup apparatus; a reception unit for accepting a backup instruction for the taken image by a user; a transfer unit for writing predetermined taken image information read from said first image storage medium into said second image storage medium and erasing the predetermined taken image information from said first image storage medium according to a detection output of said connection detecting unit and an output of said reception unit; a conversion unit for converting the predetermined taken image information, written into said second image storage medium, into an image matching a display ability of said image display means; and a second transfer unit for writing image information converted by said conversion unit in said first image storage medium.