First, you must download the plugin you received. Then go to the portal where you manage the Magento version.

In the picture Cloud Cluster is being used as a portal, but you don't have to use the same one.

Next, go to Manage, then to File Manager and find the following path: app, and create a folder named code. Inside this folder code you must create another folder with the name ETpay.

Then, using our FTP service, we will upload the files delivered by the integration agent to the ETpay folder previously created.

In the photo FileZilla is being used, but again, it is not necessary to use this specific one.

After you have created the folder and uploaded the files to the folder, you need to upgrade Magento. Then, in the Magento admin panel, select Shell/SSH and execute the following commands (in order):

cd magento
php bin/magento setup:upgrade
php bin/magento setup:di:compile
php bin/magento setup:static-content:deploy -f
php bin/magento cache:clean
php bin/magento cache:flush

These commands make Magento "assimilate" the new files.

Finally, you must go to Magento backoffice, then to STORES > SALES > Payment Methods. Here you can configure the ETpay sandbox (or productive) environment that we delivered to you.