The Open Source Cartridge Reader (OSCR) is a versatile tool designed to help preserve video game cartridges and save data. Developed by Sanni and the community, this device allows users to back up ROM files and save games from a wide range of vintage consoles.
That’s very cool but the backup law really is only effective with drm free games on PC, your console can’t play your backups and if Nintendo had their way even modifying your console to run backups would be illegal, but thankfully only Japan is a dystopia in that sense, for now.