Please follow these steps for easy downloading.
Visit the FireStick home page.
You can find ES File Explorer under the Search tab.
In the next window, you will see the ES File Explorer icon.
Install the app after you download it and wait while it installs.
Launch the app via the Open button, or run it later from Your Apps & Channels.
Go to My Fire TV and select it after clicking the Settings Gear icon on the home screen.
On the Creator Options menu, choose Install Unknown Apps.
To activate ES File Explorer, click on it.