To use .cia files, your console must have Custom Firmware (CFW) , such as Luma3DS, to bypass Nintendo's signature checks. 1. Installing with FBI
These are specific dumps with valid digital signatures from Nintendo. Historically, these could be installed on consoles without custom firmware (CFW) if they were originally pre-installed titles, though modern modding typically bypasses this need. How to Use .cia Files on Your 3DS nintendo 3ds .cia
They contain the game content, Title Metadata (TMD) , and an encrypted Ticket that authorizes the console to run the software. To use
What's the difference between 3ds files and CIA files? : r/3dspiracy To use .cia files