Hello HjalleBK and welcome to the forum.
This sounds like one of 2 things : something to do with the USB interface on your system, or problems with the discs. I’ve had USB drivers which made my USB devices so unstable, I could not finish a single burn. At the same time I’ve also had TDK 8x DVD-R discs with poor burn quality around the first about 15% of the disc.
To figure out which of these two is the cause of your problems, do a few simulated burns and see if they work successfully. Simulated burns pretend to write to the discs, but don’t actually do that. So if there are problems with the discs, a simulated burn will still succeed. If there is a problem with the USB interface or USB drivers, however it will probably crash during burning. The best part is that since it won’t really write to your discs, it won’t even use up a single blank disc.
To do a simulated burn, first get hold of Nero CD Speed. This normally comes with Nero itself but check the version you have installed. You’ll need at least version 4.51.1. If what you have is something older, you can get the latest version here : http://www.cdspeed2000.com.
Then follow these steps :
First we create a disc image on your HD to use for testing -
[li]Get a disc which your old writer successfully wrote, preferably one that is full or nearly full
[/li][li]Use Nero to copy the DVD to an image file (either .nrg or .iso will do fine)
Now we do the simulated burn :
[li]Start CD Speed
[/li][li]Place one of those TDK 8x DVD-R discs into the drive
[/li][li]Once the disc is recognised, click on the “Create Disc” tab
[/li][li]Set the speed to 8x (should be the default)
[/li][li]Select the check boxes marked “Simulate” and “Burn image”
[/li][li]Click the “Start” button
[/li][li]When prompted for a disc image, select the one you created above
[/li][li]The simulated burn should start
Watch for errors during burning. Try running the test 5 times but stop if you encounter an error. After burning each time, eject the tray and then close it again and the disc will show up as blank. You can then run the burn simulation again.
If you manage to do 5 simulated burns without problems, it’s probably the discs that are dodgy. Getting some other discs (Verbatim or Taiyo Yuden are recommended). If you encounter an error and the burn crashes at some point, it may be a case of the USB interface or your USB drivers causing the problem.