This region contains information unique to the specific physical tag or data that changes over time.
To understand why unfixed-info.bin is named "unfixed," it helps to understand how the 540 bytes on an Amiibo chip are partitioned: Internal Serial Numbers
If the file belongs to a specific ecosystem (like a gaming console or a router firmware update), you must load it into the corresponding hardware flashing tool or emulator software designed to parse that specific data structure. Is unfixed-info.bin Safe?
Always ensure your backup activities respect local intellectual property laws and focus on preserving your physical collection. unfixed-info.bin
| Aspect | Details | | :--- | :--- | | | unfixed-info.bin | | Function | Stores system update history and network info for display. | | Location | SD Card ( Nintendo 3DS/.../sys/ ) | | Can cause bricks? | No. | | Common Issue | System Settings crashing; solved by running a System Update. |
What or behavior are you currently experiencing?
It's important to note that you will often see these files referred to with the prefix "retail", as in Have retail unfixed keys or Have retail locked keys in the TagMo UI. This indicates that the keys are from retail, Nintendo-produced hardware. The use of the word "key" suggests these are not generic files but are specific cryptographic components that must be kept secure. For this reason, they are almost never included with the modding tools themselves. Users are typically expected to source them independently for legal and security reasons. This region contains information unique to the specific
: Specifically, unfixed-info.bin (often 80 bytes) is used as the data key to handle the portions of the Amiibo's internal storage that are not fixed or locked, allowing apps to sign and write data to blank NFC tags like NTAG215 .
Nintendo’s Amiibo chips utilize an internal format divided into distinct security sections. To read or duplicate this data, software requires two complementary cryptographic files:
: This file contains the keys used to decrypt the fixed, core data structures common across all Amiibos. unfixed-info.bin is a small
In simple terms, unfixed-info.bin is a small, binary ( .bin ) data file that contains an used in the encryption and decryption of Amiibo data. It is part of a set of essential cryptographic keys that allow third-party applications to read, write, and generate the data associated with these interactive NFC figures and cards.
As a workaround, developers write their software to accept user-provided key files. When you load unfixed-info.bin into an app like TagMo: The app unlocks its decryption engine. It gains the ability to read raw Amiibo dump files (.bin). It extracts the unique UID of your blank NTAG215 tag.
A working framework for handling "unfixed" files
AMD Adrenalin has a unique update mechanism. When you install or update your graphics drivers, the software performs a multi-phase integrity check:
Signs and verifies the read-only, hardware-specific identifiers like the UID. Data Master Key