Troubleshooting and Repairing a Faulty USB Flash Drive
This article narrates a step‑by‑step troubleshooting process for a malfunctioning 128 GB USB flash drive, covering initial failure, diagnostics with Windows Disk Management, chip detection tools, firmware re‑flashing using mptools, speed testing with DiskMark, and final verification, offering practical tips for similar hardware repairs.
The author recounts discovering a broken 128 GB USB flash drive purchased for a parent, noting that copying a large file caused the MacBook to freeze and the drive to become unreadable.
Initial analysis considered both software and hardware faults, prompting the author to connect the drive to a Windows PC, where the drive appeared but its capacity was not displayed.
Using diagnostic tools such as ChipEasy and ChipGenius, the author identified the controller chip, confirming that the hardware was not damaged, and proceeded to re‑flash the firmware with the mptools mass‑production utility.
After the re‑flashing process completed, the drive was verified to be functional again, showing correct capacity in the file explorer and disk management.
To assess performance, the author ran DiskMark tests, observing average read/write speeds of about 3 MB/s on a USB 2.0 port and up to 6 MB/s on a USB 3.0 port, concluding that the drive operates at low speed but is usable for small files.
The final conclusion recommends using a higher‑capacity USB 3.0 drive for better performance, while noting that the repaired drive now works reliably after the firmware restoration.
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