A “64GB” SanDisk Cruzer Blade that corrupts files after 4GB.
In this post, we’ll take a deep dive into ChipGenius v4.20—what it does, why version 4.20 became a landmark release, its strengths and flaws, and how to use it safely today. ChipGenius is a lightweight Windows utility designed to identify the internal controller chip and flash memory model inside USB devices. Unlike standard OS tools that only see the vendor name and product string (which can be faked), ChipGenius queries the USB descriptor directly and compares it against an internal database of known chips. chipgenius v4.20
Controller: Alcor AU6989SN-GT Flash ID: AD 3A 18 A3 00 – Hynix H27UBG8T2B (8GB) Possible Flash Chips: 8GB (single die) Drive Capacity: 64GB (faked by firmware) Counterfeit. The controller was re-flashed with a fake capacity firmware. Using Alcor’s mass production tool (found via the controller ID), I restored the drive to its real 8GB capacity. Not a 64GB drive, but a usable USB stick instead of e-waste. A “64GB” SanDisk Cruzer Blade that corrupts files
| Version | Status | Notes | |--------|--------|-------| | | Free, stable | Last version with broad free distribution. Database frozen in ~2015. | | v4.21 | Free but scarce | Minor database update. Hard to find clean copies. | | v4.5 / v5.0 | Commercial | Pay-per-use or license. Better USB 3.1/3.2 support but often malware-wrapped. | | ChipEasy | Free alternative | Different UI, similar concept, but less comprehensive. | Unlike standard OS tools that only see the
Many technicians still keep a copy of v4.20 on their USB repair toolkit because for 90% of pre-2018 drives. Real-World Use Case: Detecting a Fake Capacity Drive Let me walk you through an example from my own workshop.
