Evolphin Zoom is able to handle assets that are both individual assets and entire folders. Within Photoshop, most Photoshop documents are composed of one individual PSD file. However, there are also instances where a Photoshop file may be composed of multiple assets.
In Photoshop CC, Adobe introduced the Generate Assets feature that allowed users of Photoshop to generate multiple sub-images that are automatically created when the Photoshop document is updated. When this occurs, you may want to checkin your assets next to the Photoshop document as well as the Photoshop document.
In instances such as these, it is suggested to store your Photoshop document and related assets in an individual folder.