SAMSUNG DVD R120 error EC:0207
I had exactly the same problem -- error message of "This disc can be neither played nor recorded. Please check the disk [EC:0207]" after the machine had been working fine for a year. I downloaded the latest firmware from the Samsung website, burned it to a CD-R disk (took three tries until the DVD Recorder recognized the disk -- worked when I used Rocio CD Creater software), then loaded the firmware updates to the DVD Recorder. On the Samsung website you can retrive the firmware update instructions as well. I had to perform the firmware upgrade several times until it successfully updated both the system firmware as well as the disk firmware. After successfully updating both, the Recorder now recognizes the DVD-R disks and I was able to resume recording. I have however, noted some choppiness with the playback of the newly recorded disks. Other than that, the firmware upgrade successfully resolved the problem.