: Check your USB cable, try a USB 2.0 port instead of USB 3.0, and reinstall the ASUS Android USB drivers.
If you tell me the exact model of your ASUS phone (e.g., Zenfone 2, Zenfone 5), I can help you find the correct firmware. asus flash tool v10011 high quality
In the world of firmware modification, newer software is not always better. Version 1.0.0.11 has earned a reputation within the Android development community as a highly stable legacy release. It features broad backward compatibility with older Intel-based ASUS ZenFone units (like the classic ZenFone 2 series) while still utilizing the robust Fastboot protocols required by newer, Qualcomm Snapdragon-powered ZenFone and ROG models. It strikes an ideal balance, minimizing structural bugs and random disconnections that occasionally plague later releases. Key Features and Capabilities : Check your USB cable, try a USB 2
Click on the "Browse" or "Load" icon and select the .raw or .bin firmware file you downloaded. Version 1
The ASUS Flash Tool is an official Windows-based utility developed to install stock firmware (ROMs) on ASUS smartphones and tablets. Version 1.0.0.11 is highly regarded by technicians for its stability, particularly with legacy Intel and Qualcomm-based ZenFone models. It communicates directly with your device in fastboot or recovery mode to write system files directly to the internal storage. Key Features
Flashing with AFT is performed while the device is in , not during normal operation. The exact key combination to enter Fastboot mode varies slightly by model, but for most ASUS devices it is: