Actually DVD-5 format disks hold 4.36-7 GB in practice. DVD-9 format disks hold 7.95 GB, & the double-sided DVD-18 format twice that amount (15.9 GB.) But you can only burn dvd's if you have a dvd burner. And you need to be aware of what format of dvd it can burn. Most burn dvd-5 format, the newer ones burn dvd-9 format also. You also need to be aware of the difference between dvd minus & dvd plus. It's a little like the difference between beta & vhs video in the respect they do the same thing but are different formats. Most will burn both dvd+/- but some will only burn one of the other. Check with your burner manual to see what it can do. If you don't have a manual, find out the brand & model no. & google it & look for its specifications. This is important to know because if your burner only burns one format +/- or only dvd-5 (4.7) disks, then putting the wrong type of disk in to burn may result in anything from refusal to burn, burn failure, or at worst, damage to your burner. It then becomes a cup holder. lol