The FujiNet WiFi Network Peripheral Owner’s Guide is a short, Atari-style manual for setting up and using FujiNet with Atari 8-bit computers such as the 400, 800, XL, XE, and XEGS. It explains FujiNet as an open-source WiFi SIO peripheral that acts like multiple disk drives, a microSD software library, network adapter, printer capture device, clock, modem-like network interface, and online game launcher. The guide walks users through connecting the device, joining a 2.4 GHz wireless network, using the built-in CONFIG program, setting host slots such as fujinet.online or SD, browsing online software libraries, filtering/searching with wildcards, mounting ATR/XEX/CAS images into virtual drive slots, booting programs, swapping disks with the hardware button, creating blank ATR disk images, copying files to SD, viewing network information, using the built-in web interface, and troubleshooting common problems. It is written as a friendly quick-start and reference manual that makes FujiNet feel like a modern Internet-connected disk drive for classic Atari computers.