AMD Adrenalin has a unique update mechanism. When you install or update your graphics drivers, the software performs a multi-phase integrity check:
The unfixed-info.bin file represents the master key required to interact with the data region of the Amiibo tag. Key Specifications: File Size: Exactly 160 bytes. Primary Companion: locked-secret.bin (exactly 80 bytes).
Before we can understand unfixed-info.bin , it's important to grasp the fundamental structure of an Amiibo's data. Nintendo’s Amiibo figures are built on standard NTAG215 NFC chips, but a proprietary encryption system protects them from being easily cloned. Their memory is divided into two distinct areas that are handled differently by the console, which is where the unfixed-info.bin and locked-secret.bin files come into play.
Then delete it. Or keep it as a pet. Your call. unfixed-info.bin
Given the sensitive nature of this file, here are some best practices when working with it:
The data is a direct, byte-for-byte copy of the source material.
To understand why unfixed-info.bin is necessary, it helps to understand the physical medium of an Amiibo. Amiibos use NFC chips. These chips have 540 bytes of total memory, with 504 bytes of user-writable memory. AMD Adrenalin has a unique update mechanism
: Unless you are a game developer working with Unreal Engine, assume the AMD origin first.
Because unfixed-info.bin contains proprietary cryptographic data owned by Nintendo, it falls into a legal gray area.
Together, these two files allow third-party apps to verify that an Amiibo dump is legitimate and prepare it to be written onto a blank NTAG215 chip. Why Do You Need It? Primary Companion: locked-secret
The relationship is sometimes described as the key_retail.bin acting as an index, which then points to the specific roles filled by locked-secret.bin (for static data) and unfixed-info.bin (for dynamic data). In some instances, the two are even combined, as a concatenated version of unfixed-info.bin and locked-secret.bin is sometimes used under the name key.bin .
Handles the decryption of the data that the console writes to the tag.
This region contains static information that defines what the Amiibo actually is. It is permanently locked during the manufacturing process.