Toast Doubling Size Of Files To Be Burnt (Blu-Ray Udf), Solution in Toast 11 Posted April 22, 2013 · Report reply Very strange: I want to to burn 19GB of authored BR video on a BD-R. If I put in a blank disc, select UDF, drag the video folder into the TOAST window, it correctly displays 19GB. Hitting "Burn" starts the process, which is stopped showing a hardware failure message. The blank disc remains untouched. The total file size is now 38GB. After a few tries I figured out the following workflow as a work-around: 1.) Quit Toast 2.) Open tray 3.) Start Toast 4.) Select UDF 5.) Drop your video folder into Toast window 6.) Hit "Burn" 7.) Confirm to close tray Now it works. 19GB successfully burnt.