Developers often added "padding" or dummy data to UMDs to keep the laser head from moving too much. Compression tools stripped this useless data instantly. The Trade-offs of Compression
A "highly compressed" game is an ISO or CSO file that has been modified to reduce its file size significantly. While the original Crisis Core ISO is roughly 1.6 GB, a highly compressed version can be shrunk down to 500 MB or even less. Techniques used for compression include: crisis core final fantasy vii psp highly compressed
Converting the raw ISO file into a Compressed ISO (CSO) format. This uses a standard compression algorithm that the PSP can read in real-time, though it often results in longer loading screens. Developers often added "padding" or dummy data to
In some cases, CSO files can actually increase loading times because the PSP hardware has to decompress the data on the fly. While the original Crisis Core ISO is roughly 1