A Source Connector defines a source directory and a set of rules on how to handle the content of a directory. It also defines the access restrictions that apply to the assets within the source directory.

The Source Connector type Storage imports images to the storage for the best possible image delivery performance (like in previous versions).
The input formats for this source connector type are: PNG, TIFF, JPEG, BMP, GIF, FPX and many others.

As of version 2016 of FSI Server, there are two new source connectors types that allow access to assets and images without the need to import them.

The source connector type Multi-Resolution provides the ability to upload multi-resolution .tiff or .fpx files and accessing these directly using the same URL-syntax as you would for imported images. This feature is primarily aimed at customers with a large stock of multi-resolution images and makes it easier to  migrate for users of imaging servers other than FSI Server.
The input formats for the multi-resolution source connector are TIFF and FPX.

The other new source connector type called Static allows managing and serving static files such as PDFs and videos, which can be addressed via a simple URL.
Examples for input formats for this source connector type are: PDF, ZIP, MP4, MP3, DOC, AI, EPS, XLS, TXT and many more.