If you want to delete the items you can simply select them and delete them. Other than selecting all from the grid, there is no way of doing bulk delete like you do with archiving, if that's what you're asking.
If you are using a lot of attachments, one option might be to not store the attachments in the database and instead store them on a network share. Depending on what your process is that may or may not work for you.
Dan Suceava
http://www.axosoft.com