Disk Keeper is an unlicensed utility program originally released in Japan for the Famicom Disk System. Rather than a traditional game, this software was designed to allow users to create functional backups of their Famicom Disk System titles using a single disk drive. It stands as a notable piece of homebrew from the console’s active early disk-copying and preservation scene.
In this browser emulation, you can boot the utility to explore its original interface. While its primary function required physical disk swapping to copy data, it remains available here for historical preservation. Navigate the menus using the default Famicom controls, with the D-pad mapped to the arrow keys, A and B mapped to Z and X, and Start and Select mapped to Enter and Shift.
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