Details, details, and even more details. Once you become a full-time designer, details become your one and only thought surfacing in regular and important projects. But that is in no way a bad quality to have in your work since graphic designing focuses on multiple simple elements coming together to create one look, just like in this free folder mockup shared by Mockups Design.
This graphic comes in 3 separate PSD files and presents a folder in multiple positions which allows you to share your branding designs for the front and the back cover, the inner designs, as well as the designs for the papers themselves to complete the look. You can easily personalize this mockup and insert your graphics via Adobe Photoshop and include the end results in both personal and commercial projects.