DVDRW is the name of a standard for optical discs: one of several types of DVD, which hold up to about 4.7 GB per disc (interpreted as approximately 4.7 × 109 bytes; actually 2295104 sectors of 2048 bytes each which comes to 4700372992 bytes, 4590208 kilobytes, 4482.625 megabytes, or 4.3775634765625 gigabytes) and are used for storing films, music or other data.