Block files

Is it possible to insert blocks created in a drawing into a different drawing? If I use the Insert Block command there is a browse function, which only displays Blocks that have been saved as part of a drawing template. These are located within the following directory: C:\\ProgramData|Dassault Systemes\\DraftSight\\Examples. I can cut and paste blocks from one drawing to another, but it would be nice to be able to access them directly. I have trolled through my file system but cannot find any logical location where the Blocks are filed, but they must be there somewhere. Any clues as to where to look?