When a user manually updates the firmware of a Tp-link router, he has to make sure that he keeps the downloaded firmware file in an extracted form. In most cases, the firmware file gets downloaded in a zip format, so if a user extracts that file, it becomes convenient for you to upload it into the tplinkwifi.net interface. You also have to ensure that you have downloaded a new firmware file, a wrong firmware version may corrupt the update process and may affect the performance level of a Tp-link router