The file sharing section is for quality, finished cnc art, with categories and image previews to make it easier to find desirable files. Uploads are welcome, but files must be nice and ready to cut. If not, an artist may volunteer to recompose some work to make it more ready to cut. Or, if it's not original or not ready to cut, it may get unapproved, and require repairs. If you upload a DXF file, it (usually) makes a preview image for you automatically. That does not always work right because some DXF files can have strange formatting, but it usually works ok. You must always provide a quality preview image one way or another, which will show up as a thumbnail preview in the thread list. There will be tutorials on several ways to make preview images.