Drives with these specific IDs are highly associated with "capacity hacking." The firmware is "patched" so that when you plug it into a computer, it claims to have massive storage (e.g., 2TB).
For firmware engineers, the patch is a safety mechanism. If you are writing custom firmware for a device with PID_1201 (the Pico), the OS might try to mount it as a removable drive (RPI-RP2 bootloader). By patching the VID/PID to FFFF/1201 , you prevent the OS from mounting the virtual FAT32 filesystem, leaving the raw USB endpoint free for your custom protocol (e.g., CAN bus sniffer, logic analyzer, JTAG programmer). usb device id vid ffff pid 1201 patched
: Router doesn’t boot. dmesg shows ffff:1201 when connected via USB-to-TTL adapter. Drives with these specific IDs are highly associated
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