These are the most critical "deep" files. Most apps require a locked-secret or unfixed-info file to decrypt and write data to blank NFC tags.
Most writing software requires two specific files to function: locked-secret.bin unfixed-info.bin (Sometimes found together as key_retail.bin 2. Where to Find Files Official forums like Reddit's amiibo download files
If a website asks you to download an .exe or .apk file to get an Amiibo dump, do not proceed . Pure Amiibo files should always be in .bin or .nfc format. The Ethical Alternative: Backing Up Your Own Collection These are the most critical "deep" files