This is the counterintuitive exclusive feature: It’s slower, but cooler.
Do not trust the sticker on the plastic case. You must use software.
Step 1: Use ChipGenius (Windows)
Look for the Chip Part No. field. A standard chip reads SM3265AC - ISP 170512-1AB. An Exclusive will read SM3265AC - ISP Ex-190114. sm3265ac exclusive
Step 2: Use USBDeview
Check the Device Instance Path. Exclusive drivers often have a 32-character hash that includes the string MFG_EXCLUSIVE in the extended config descriptor.
Step 3: Physical Inspection Pop the drive open. A standard PCB usually has a 48-pin TSOP or a 132-pin BGA. An Exclusive chip might have a gold-colored resin dot (epoxy blob) over pin 39 (the Write Protect pin), physically preventing you from flashing new firmware. Step 1: Use ChipGenius (Windows) Look for the Chip Part No
This is a big one. The SM3265AC exclusively supports 1.8V VCCQ alongside standard 3.3V.
The SMI SM3265AC is a popular USB 3.0/3.1 flash drive controller chip manufactured by Silicon Motion (SMI). It is commonly found in USB drive repair and data recovery circles because it is robust and widely used in "no-name" generic flash drives as well as branded ones (like Transcend, Kingfast, etc.). An Exclusive will read SM3265AC - ISP Ex-190114
If you are seeing errors like "Please Insert Disk Into Removable Disk", wrong capacity, or the drive is write-protected, this guide will walk you using the SMI MPTool to factory reset (re-flash) the controller.