Optimizing and defragmenting your optical or removable media requires a few steps that depend on the type, format, and condition of the media, as well as the operating system and software you use. First, back up your data on another device or cloud service to ensure you have a copy of important files in case something goes wrong. Then, use a disk utility tool or program to scan for errors and bad sectors, and fix them if possible. After that, use a disk optimization or defragmentation tool or program to rearrange and consolidate the data on your media. You can use the built-in tools in your operating system or a third-party software with more features and options. Finally, verify the results by checking the status, performance, and space of your media. You should notice some improvement in speed, efficiency, and capacity.