If you need to open downloads, Files app, my files or Files manager is where you will find all of your content. This phone comes with a pre-installed file manager that may be called Files app, my files or Files manager. If not, Google Play has many options to choose from. If you're using a third-party software for your downloads, it will have its own designated folder to store your downloads. Check the help section of your download software for more information on where to find it.