FSI Server does not alter the source image pool. The size of the internal storage for FSI Server depends on the quality settings.
FSI Server converts the source images into an internal format.
This graph shows the storage size required for a source image pool of approx. 735 MB (771.595.235 Bytes) which consists of typical JPEG and TIFF files after conversion with different settings.
Using a JPEG Quality of 83% will require roughly about the same amount of diskspace for the internal storage as the source images, while the default quality of 94%, which is suitable in most cases, will require about twice the size of the source images.