Proceed with caution, always back up your data before attempting any repair, and you will have a reliable, like‑new USB drive ready for years of continued service.
The Phison controller uses and handles bad block management at firmware level. A “full format” in Windows issues TRIM-like commands (via UASP) if supported, but USB 3.0 often lacks UASP on older hosts. Without TRIM, performance degrades after many writes.
Several tools can perform low‑level formatting on the Phison PS2251‑162. Below are the most reliable and commonly used ones. formatter silicon power v3700 ps2251162 2021
Effective for cleaning drives that cannot be formatted through standard Windows or Mac OS tools. General Usage Procedure
What does Windows show when you try to use the drive? Proceed with caution, always back up your data
If your drive is not responding, experts generally recommend this hierarchy of tools available on the Silicon Power Support Page:
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. Without TRIM, performance degrades after many writes
When a drive undergoes a severe file system crash, sudden disconnection, or power surge, the controller chip locks itself into a protective to prevent data corruption.
Try switching to a different USB port. If it still fails, you may need to look into putting the drive into Test Mode by carefully shorting the data pins on the controller chip while plugging it in, forcing it to identify as a generic Phison bootloader device. Error: "Format Fail" or Firmware Mismatch