9.4 GB Double-Sided DVD-RAM Type 1 (non-removable) Discontinued by Panasonic we recommend:  Certified Plus - 9.4GB removable disc Type 4 Panasonic 9.4GB DVD-RAM media, Double-Sided Cartridge Type 1 (non-removable). Compatible with Panasonic LF-D311, LF-D321U, LaCie 300165 and QPS QPDVRPN1F. Panasonic DVD-RAM media is designed for data intensive, high performance applications. Data stored on a DVD-RAM disc can be accessed in the same manner as a hard drive, with drag and drop capabilities, and can be overwritten 100,000 times. DVD Format Speed Compatible DVD-RAM Recorders 9.4GB Double-Sided DVD-RAM Type 1 Cartridge (non-removable) 1X LaCie 300165 Panasonic LF-D201U, LF-D321U, LF-D311 QPS QPDVRPN1F Toshiba SD-W2002