The distinction between attaching and mounting is probably too technical for the main page here. I propose relocating the "Auto-mount on attach" checkbox, since 99.9% of users are going to have no clue what it means.
Same for "Mount all removable media at login". Would a user ever care about removable devices in a sufficiently granular way as to want removable devices that were connected when the computer turned on to be automatically mounted, but for removable devices that he deliberately inserted later to NOT be automatically mounted? What's the user story for this?