*[https://github.com/zeus074/Amstrad_Multicart Amstrad Multicart] 16-in-1 cartridge for the GX4000 or Amstrad Plus computer
*[[C4CPC]] Cartridge replacement for the Amstrad Plus range and the GX4000
*[https://overange.weebly.com/amstrad-gx4000-cpc-464-6128-plus-reflashable-flash-cartridge.html Flash+ cartridge] Amstrad CPC+ GX4000 reflashable cartridge
= Mass-storage =