What are the differences between various types of writable DVD media (DVD-R, DVD+RW, and DVD+R?) - Quora
![DVD-RAM—the only consumer optical format to store data in physically sectored concentric rings like a hard drive, rather than in a spiral groove. When it was introduced in 1999, the 4.7GB disc DVD-RAM—the only consumer optical format to store data in physically sectored concentric rings like a hard drive, rather than in a spiral groove. When it was introduced in 1999, the 4.7GB disc](https://external-preview.redd.it/vEgyecmOTwtyvAaQv74qWFYYb53kQ6kVhg5B1ixN38I.jpg?auto=webp&s=051f73fd38dbe0bb92ffe6c836b87e5130513b9e)
DVD-RAM—the only consumer optical format to store data in physically sectored concentric rings like a hard drive, rather than in a spiral groove. When it was introduced in 1999, the 4.7GB disc
![New For Matshita Dvd-ram Uj8c2q 8x Dvdrw Dual-layer Burner 24x Cd Writer 9.5mm Sata Super Slim Ultrathin Internal Optical Drive - Optical Drives - AliExpress New For Matshita Dvd-ram Uj8c2q 8x Dvdrw Dual-layer Burner 24x Cd Writer 9.5mm Sata Super Slim Ultrathin Internal Optical Drive - Optical Drives - AliExpress](https://ae01.alicdn.com/kf/HTB1BX3eh4GYBuNjy0Fnq6x5lpXaY/NEW-for-MATSHITA-DVD-RAM-UJ8C2Q-8X-DVDRW-Dual-Layer-Burner-24X-CD-Writer-9-5mm.jpg_Q90.jpg_.webp)