When a game is "dumped" (copied) from a disc to a computer, it usually creates a file format like (International Organization for Standardization) or WBFS (Wii Backup File System). A raw ISO is a 1:1 copy of the disc. If the disc holds 4.7 GB, the ISO will be roughly 4.7 GB, even if the actual game data only takes up 2 GB. This "padding" data exists to align the file structure on the disc.
: The modern preferred format for the Dolphin Emulator . It supports lossless compression that can be reverted to a 1:1 original copy. Stability and Reliability : wii highly compressed games
: Compressed files like RVZ or WBFS generally perform the same as full ISOs on modern systems because they remove empty space that the console would otherwise just "skip". However, "highly" compressed repacks from third-party sites may cause stuttering or longer load screens if the CPU has to work harder to decompress data on the fly. Storage Efficiency : When a game is "dumped" (copied) from a
Here’s a detailed write-up on — covering what they are, why they’re used, the risks, and how to approach them responsibly. This "padding" data exists to align the file