A data storage apparatus includes a memory for data storage. The data storage apparatus further includes a data storing section, an access detecting section, and a data deleting section. The data storing section attaches storage-purpose information to data when storing the data in the memory. The storage-purpose information is setting information indicating a purpose for which the image data is stored. The access detecting section attaches access information to the data stored in the memory upon the data being accessed when the data is used. The access information is setting information indicating a purpose for which the image data is used. The data deleting section deletes the data from the memory at a specific timing when the storage-purpose information and the access information attached to the data match.