You can try using a tool like UMDGen (a popular ISO editing tool).
If you are searching for you are likely trying to fix a broken PSP game file or manually reconstruct an ISO to play on an emulator like PPSSPP .
The music swelled, a dusty melody from fifteen years ago. Leo leaned back, the "download" finished, and the game finally safe from the slow decay of time.
Here are the to obtain umd data.bin:
A homebrew application that allows you to rip UMDs directly to your memory stick as ISO files.
: It works alongside the PSP_GAME or UMD_VIDEO folders to ensure the console recognizes the disc as a valid game or movie. Why You Might Need It