Thank you for your asking. Kindly provide the information below so that we could better assist you.
1. Are you trying to find the file you download from our official website? The file may stay at
File Manager>Downloads or File Manager>Internal storage
2. Have you upgrade successfully? Please provide me your issue detail if you have encounter any difficulty.
#[Zenfone] How to update firmware on my phone?https://www.asus.com/support/FAQ/1009748/