(1) Start NERO software and select ‘No Multisession”(2) Please select ‘disc-at-once’setting area, then press ‘NEW’(3) Select the burning file (e.g. 850MB file size)(4) Press FILE>Preference, select ‘expert features’(5) Select ‘Enable Disc-at-once Overburning’ then press ‘Confirm’(6) Press BURN and the screen will show the selected file was beyond the normal usage, continue or not? Please press ‘Write Overburn Disc’ to confirm. (7) After finished, the computer could view the disc with 850MB