El disco
Despite the Famicom Disk System's success and advantages over the Famicom itself, it also imposed many problems of its own. Most common was the quality of the Disk Cards; Nintendo removed the shutters on most Disk System games to reduce costs, instead placing them in a wax sleeve and clear plastic shell. The disks themselves are fragile, and the lack of a shutter made them collect dust and eventually become unplayable as a result. Piracy was also rampant, with disk copying devices and bootleg games becoming commonplace in stores and in magazine advertisements. Third-party developers for the Disk System were also angered towards Nintendo's strict licensing terms, requiring that it receive 50% copyright ownership of any and all software released — this led to several major developers, such as Namco and Hudson Soft, refusing to produce games for it. Four months after the Disk System was released, Capcom released a Famicom conversion of "Ghosts'n Goblins" on a 128k cartridge, which as a result made consumers and developers less impressed with the Disk System's technological features. Retailers disliked the Disk Writer kiosks for taking up too much space and for generally being unprofitable. The Disk System's vague error messages, long loading times, and the poor quality of the rubber drive belt that spun the disks are also cited as attributing to its downfall.