The DocumentCenter allows you to upload unlimited documents in any format (PDF, JPEG, MS Word, etc.), for parents or other users to download and view. It will also be where reports, such as transcripts and the student reports, are output in PDF format that are then automatically shared with the parents of the students (at your discretion) via the portal.
Each client will receive 1 GB of storage for their documents, which should be plenty unless you need to upload a lot of really large files. Extra storage can be purchased if needed.