Created attachment 119449 [details] screenshot SUMMARY Problem of burning BD-RE 25 GB ISO images STEPS TO REPRODUCE 1. Insert an BD-R preformated BluRay 25 GB 2. Try to burn an iso image (for example : debian-9.8.0-amd64-BD-1.iso) OBSERVED RESULT According to the error popup window (see the pic below), it seems that K3B considers that media is already burned and it does not propose to reformat it. The inserted BluRay disc is blank and has been formatted with the same application for first use. EXPECTED RESULT Burn the media SOFTWARE/OS VERSIONS Linux Debian Wheezy, Jessie and Stretch K3B version : 2.0.3 (on the 3 distro) Media : SONY Corp. BD-RE 25 GB 1-2x Hardware used : burners : - MATSHITA BD-MLT UJ272 (via the USB port) - MATSHITA BD-MLT UJ260AF PC : - HP Pavilion g7 (SATA) - Z83II-Mini-PC (USB) - ASUS K52F (USB) ADDITIONAL INFORMATION : The K3B can format the media and I used it with Nero 4 for linux without problem to burn BluRay ISO like debian-9.8.0-amd64-BD-1.iso. (Nero doesn’t work to format the media). There is also an older burning problem of small 1.4GB DVDs. Burning fails when closing the disc. The problem only applies to 1.4GB DVD-R, not 1.4GB DVD-RE. ------- Not tested with new versions of K3B 17.xx.xx or 18.xx.xx --------