Optical Disc Archive incorporates 12 discs into a single cartridge to deliver a large capacity of up to 1.5 TB. Compared to Blu-ray disc with which no more than only 100GB can be stored on one medium, Optical Disc Archive offers the convenience of being able to handle large volumes of data at once. For example, to store 1 TB of data using 50GB Blu-ray discs, twenty discs have to be inserted into the drive one after the other to write data and care must then be taken when storing discs after writing has been completed to ensure that they do not become separated. With Optical Disc Archive, however, writing can be performed by a drag & drop operation. In addition, because discs on which data has been written are encased in the cartridge, protecting them from contaminants such as dust, the cartridge can be simply stored on a shelf, facilitating subsequent management.