DVD-R - Storage 4.7GB of storage. Commonly called a "blank DVD". Used for data, films, pictures etc.
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What is the Actual Storage Capacity of a DVD Disc? - CDROM2GO
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DVD - Wikipedia
La capacidad de 4,7 GB DVD en blanco 1-16X - China DVD-R y grabadora de DVD en blanco media precio
Verbatim DVD+RW 4x Disc (10) 94839 B&H Photo Video
Verbatim DVD+RW Non-Printable 4x 4.7GB (Pack of 10) 43488