A digital camera is provided with a picture filing key including a grouping button. Upon turning on the grouping button, a grouping mode is set. When a picture is taken under the grouping mode, link information is added to image data to be recorded in a memory card. In virtue of this, the pictures are grouped. By operating the picture filing key, it is possible to delete the picture from the group, to link the groups, and to divide the group. When the pictures recorded in the grouped state are put into an application, which is capable of distinguishing the link information, it is possible to transfer and copy the data group by group. Management of the data becomes easy.