Hedge supports all regular external and internal disks that don't require additional drivers. Do you have a disk that doesn't show up in Hedge, but is viewable in Finder? Please let us know, so we can work together to add support for it.
Networked disks, and RAID disks that don't identify themselves as USB drives are supported in Hedge Premium. This also includes SoftRAID.
Do you have another type of disk that isn’t showing up in Hedge? Let us know through firstname.lastname@example.org.