Before the update process, make sure you download the correct firmware file for your extender, an incorrect firmware may void the warranty of your product and may also bring damage to its hardware. During the manual update process, once a user has downloaded the firmware for his extender he has to make sure that he unzips the downloaded firmware file. The extracted firmware file provides users with the convenience to easily select the file and upload it into the dlinkap.local web interface.
https://dlink-dlinkrouterlocal.com