After the repair, use a tool like to test the true capacity of the drive.
Look at the and Controller Vendor lines.
Link directly to the where the tools are hosted.
Inside the configuration menu, locate the settings. Set this to Product Select or Default Scan .
The controller will bypass its broken internal boot code and boot into a generic test state, allowing the Firstchip MpTool to successfully recognize the hardware and accept the new firmware. Conclusion Firstchip Yc2019
If you suspect a USB drive contains the YC2019 controller, there are several ways to confirm. The most common method is using free software tools that read the controller's identity. (芯片精灵) is the industry standard for this task. When you plug in a drive with this controller, ChipGenius will typically report:
Setting the "Scan Level" (e.g., Clear + Factory or High Scan) to balance between data integrity and speed. Finalization:
Look at the main user interface. You should see your USB flash drive detected in one of the numbered graphical slots. If it does not appear, click .
The most notorious issue associated with the FirstChip YC2019 is its prevalence in fraudulent USB drives. This issue has become so widespread that it has drawn attention from both tech enthusiasts and mainstream consumers. The problem stems from the controller's programmable nature, which allows manufacturers to modify its firmware to misreport storage capacity. After the repair, use a tool like to
In legitimate manufacturing, the YC2019/FC1179 controller is used in a wide range of USB 2.0 flash drives produced by smaller brands and OEMs. Its low cost and adequate performance make it an attractive choice for promotional USB drives, basic data storage devices, and embedded systems that require removable storage.
Download a free hardware information tool such as or Flash Drive Information Extractor (Innostor) .
When users write data beyond the true physical capacity, the older data begins to be overwritten without warning, resulting in complete file corruption and data loss. The controller's firmware, in its modified state, continues to cycle through the limited physical blocks, giving no indication to the user that their data is being destroyed.
The drive completely stops responding, often showing up in Device Manager as an unknown device or "Unknown USB Device (Device Descriptor Request Failed)." Inside the configuration menu, locate the settings
A drive featuring this controller will yield output similar to this: Firstchip
Insert your Firstchip Yc2019 USB drive into a native USB 2.0 port on your computer (avoid using external USB hubs). Step 3: Device Detection
The FirstChip YC2019 is a 32-bit RISC microcontroller based on the ARM Cortex-M4 core, operating at a maximum frequency of 240 MHz. It features a rich set of peripherals, including Wi-Fi, Bluetooth, and a range of analog and digital interfaces. The YC2019 is designed to provide a high level of performance, low power consumption, and a small form factor, making it suitable for a wide range of applications.
Click to begin the low-level formatting and firmware flashing process.
: Firmware and tools are typically hosted on specialized sites like FlashBoot.ru and USBDev.ru .