When your computer stops recognizing your flash drive and instead displays with a "No Media" status, it means your drive's firmware has crashed into a failsafe mode. This specific name shows up because the generic operating system driver is reading the default identifier of a corrupt Phison microcontroller (Vendor ID 13FE ) inside the drive rather than your flash drive's actual brand partition.
If the drive is showing as "13fe USB Disk 50X" but contains crucial photos or documents, do not panic yet.
If the drive is completely dead and causing system errors, you can blacklist it using a to prevent the kernel from trying to interact with it. Create a file like /etc/udev/rules.d/99-blacklist-13fe.rules with the content:
Look for a disk that matches the size of your flash drive (it may show up as "Unallocated" or "No Media").
The isn't just a random name; it's a technical identifier for a specific class of Phison-controlled flash drives, often seen in the wild as Kingston or white-label "mass storage" devices.