Amazon.comThis 50-pack of 4x DVD+R discs for newer DVD+R/+RW drives consists of write-once, single-sided discs that store up to 4.7 GB of data and approximately 120 minutes of DVD quality video--that's more than six times as much data as will fit on a recordable CD. You can transfer your home movies from VHS or 8mm cassettes, back-up computer hard drives and large files, or stuff them chock full of MP3 music files and JPEG image files from your digital camera.The discs are backward-compatible with older, 2.4x DVD recorder drives through the use of a simple firmware upgrade for the drive in question, which you can downloaded at www.dvdrwservices.com. A one-year warranty protects you against defects in the near term, while the discs' rated archival life of 70 to 100 years means you can rest easy about the future of your data.Special Note: If you currently own a 2.4x DVD+RW/+R Drive you must upgrade your firmware. 2.4x Write Speed DVD+RW/+R Drives sold by Memorex, Phillips, H/P, Verbatim, Sony and QPS require a drive firmware upgrade. Memorex 4x media is compliant with the new 4x write speed standards. Using the Memorex 4x Write Speed media with a 2.4x write speed DVD+RW/+R drive that has not had a firmware upgrade to support the new 4x write speed standards may result in writing errors, data retrievable failure and damage to the data on this disc. Please make sure to confirm whether your drive supports the new 4x write speed media before use.What's in the Box50 pack spindleProduct DescriptionPersonalize, Protect and Organize All Your Memorex DVD's and CDR's with Memorex Labeling Kits, Labels, DVD Storage Cases and Jewel Cases.