Windows Device Manager recognizes a device, but it reads as "Phison 2307 PRAM" with 0 bytes capacity. (NAND communication broken) USB Device Not Recognized
The drive may suddenly report as "Write Protected" to prevent further heat-generating activity.
When a flash drive utilizing this chip becomes physically hot to the touch, it is usually caused by one of three core engineering failures: 1. Internal Power Rail Short-Circuits
Demystifying the Phison PS2251-07 Go to product viewer dialog for this item. (PS2307): Causes, Risks, and Fixes for a Hot USB Drive The Phison PS2251-07 (also known as the PS2307) Go to product viewer dialog for this item. phison ps225107ps2307 hot
: This controller is notorious for reaching high temperatures during sustained use. Users frequently report that the drive becomes "noticeably warm" or even "insanely hot" when performing large file transfers or watching HD video directly from the drive. Speed & Throttling
Users frequently report that drives with this controller can run physically hot during large file transfers. This heat often leads to a "Firmware Panic"
If heat causes a read-retry failure during operation, the controller experiences a firmware "panic". When this happens, the drive drops its volume layout and mounts in Windows Device Manager as an unreadable storage device labeled . Windows Device Manager recognizes a device, but it
When users search for "phison ps225107ps2307 hot," they are often dealing with a specific issue: the drive feels during operation, has suddenly become write-protected (read-only), or fails to be recognized by the system.
| Symptom | What is happening | | :--- | :--- | | after 2 minutes of copying a large video file. | Controller junction temp exceeds 80°C. | | Speed suddenly drops 90% (e.g., 100 MB/s → 10 MB/s). | Firmware thermal throttling activates. | | Windows "Code 43" or "USB Reset Failed" | Controller thermal shutdown causes a voltage sag, disconnecting the USB bus. | | Copy pauses for 10-20 seconds before resuming slowly. | NAND controller enters error recovery mode due to bit errors caused by heat. | | Drive disappears and reappears in File Explorer. | Thermal protection circuit tripped. |
To understand why a drive fails, it helps to understand its native architecture. Developed by PHISON Electronics Corp. Users frequently report that the drive becomes "noticeably
This is why the PS2307 is famous. In the hardware community, "Hot" often refers to how hackable a device is. The PS2307 is arguably the most accessible controller for attacks.
controller. This specific chip is a popular USB 3.0 controller found in many mainstream drives like the Kingston DataTraveler series
This is the actual operational code that dictates how the controller communicates with the computer and manages the NAND memory.
