Since the KP206BUB is a generic model based on the Xprinter XP-58II or Zjiang chipsets, you have four safe options:
If the printer shows as “USB Printing Support” or an unrecognized device, a driver update is needed. thermal receipt printer kp206bub driver upd
Cause: The print spooler is stuck, or the USB cable is faulty. Fix: Since the KP206BUB is a generic model based