Class 4 SD: 15 minutes, 15 seconds

Class 10 UHS-1 microSD: 2 minutes, 58 seconds

For comparison, FBI network install to a New 3DS with a Class 10 UHS-1 microSD: 48 minutes, 14 seconds

custom-install is a Python 3.6+ tool that will install CIA files to a Nintendo 3DS SD card entirely on a PC. This completely bypasses the slow wireless and I/O speeds of the hardware.This has no GUI at the moment, so you are expected to know how to use a command-line interface. It also currently does not verify CIAs, so corrupted CIAs may not show errors during install.Example speeds installing Pokémon Ultra Moon, about 3.45 GB (does not include final step to install a ticket and seed):Thanks to wwylele and his work on save3ds which has made modifying title.db on PC possible.Please read the README for usage details.