"I have some Blu-ray contents in a BD50 disc (The content is no more than 20GB). Now I want to store these contents on another blank BD25 disc. I would like to know a tool to help me shrink BD50 to BD25 without quality loss. Is there any way to do this?"
To do this, you can use Leawo Blu-ray Copy, a professional Blu-ray backup program to help you easily copy and back up Blu-ray discs to computer or discs. Meanwhile, it could also shrink BD50 to BD25 to help you store BD50 content on BD25 disc without quality loss. Check the following detailed steps to know how to compress BD50 to BD25 with lossless quality.
Step 1: Install the program on your computer and launch it. Load source Blu-ray disc to the program by clicking "Source" drop-down button. (Note: You need to get Blu-ray drive on your computer, otherwise you can load source Blu-ray folders or Image File from your computer.)
Step 2: Choose output directory by clicking "Target" drop-down button. Choose disc type in "Disc type" drop-down button. As you want to shrink BD50 to BD25, choose BD25 in Disc type drop-down button.
Note: If your computer only gets one Blu-ray drive, you have to firstly copy your BD50 disc to your computer folder and then copy the backup BD50 folder on your computer to a blank BD25 disc with this Blu-ray shrinker in the same way as mentioned above. If you have got two Blu-ray drives on your computer, the "Target" drop-down button will show you an option of the blank Blu-ray disc in the other Blu-ray drive for you to choose from.
Step 3: Do essential settings. You can now choose the BD50 to BD25 Copy mode and Disc label. There’re three copy modes for you to choose from: Full Movie, Main Movie and Custom Mode. Under Main Movie or Custom Movie copy mode, you are able to make a preview of source Blu-ray files and select audio and subtitle of source Blu-ray files.
Step 4: Start backup work. Click the "Start" button to start copying BD50 to BD25.
Note: If you want to copy and shrink BD50 to BD25 disc on Mac OS computer, you can turn to use Leawo Mac Blu-ray Copy.