Final Expansion 3 NG User Guide, Version 1.0 by Simon Rowe, is a 2026 manual for configuring and using the Final Expansion 3 NG cartridge for the Commodore VIC-20. The cartridge expands the computer with 512KB of RAM, 512KB of flash memory, and an integrated SD2IEC-compatible SD card drive, while providing startup menus, selectable memory configurations, accelerated disk access, a command wedge, disk-image and directory navigation, real-time clock support, a machine-code monitor, and the ability to store frequently used programs or cartridge images in flash memory for rapid launching. The guide explains initial setup, SD card use, menu navigation, loader-file creation, BASIC and machine-language loading commands, Minipaint slideshow viewing, jumper settings, troubleshooting, and firmware updating, making it both a quick-start reference and a detailed operating manual for using modern storage and memory expansion features on the VIC-20.