You can create free Blu-ray ISO Image File with ImgBurn
Step 1. Load BDMV and CERTIFICATE folder to ImgBurn
Free download and install ImgBurn, and then choose “Create image from files/folders” button. Browse to the Blu-ray folder or just drag & drop BDMV and CERTIFICATE folders along with any other file into ImgBurn as source.
Step 2. Set in ImgBurn for Blu-ray ISO creation
In “Option” tab on the right size of ImgBurn, set File System to “UDF” and UDF Revison to “2.50”. Switch to Labels tab and type the name of the film in the UDF box. Don’t forget to set output Blu-ray ISO image destination on your computer. Make sure the free space is enough for generated BD ISO image.
Step 3. Start to create Blu-ray ISO image file
Hit on the Build icon and start to create free Blu-ray ISO image file from copied BD folder. After about 10-20 minutes, the creation process completes and you can save the output BD ISO image file to the NAS server or watch all your Images play back perfectly in PowerDVD using Virtual Clone Drive to mount them with.