Could you help to unzip file zip and than merge the files excel into one?

@vittoria
You can install UiPathTeam.DotNetZip.Activities for zip/unzip from Manage Packages on Studio.
スクリーンショット 2020-09-14 120914

Use Unzip activity from installed package to extract zip folder.
About merging, you can use Merge Data Table activity after reading Excel data.