Windows 7 may not calculate the size of writable area on BD-R, BD-R DL and BD-R XL correctly.

[News]

When you try to burn 46GB of data to a BD-R Dual Layer, or 23GB to a BD-R Single Layer in master mode, the process fails and the following error message will be displayed."The disc wasn't burned successfully. Make sure that you have the latest...

More...