In 2001 Adaptec spun off their digital media division as Roxio. Easy CD Creator software allowed the user to create a Data or Audio CD layout by adding files or music in order to burn a disc. This layout could be saved for later use. The layout only referenced the file location and not the files themselves.
Files begin with hex values
10 00 00 00 01 00 00 00 01 00 00 00 for the first 12 bytes. Files end with 4 bytes
FF FF FF FF