This laptop has one hard disk with two partitions. One of them has a bunch of data. I can't delete the data at all, dolphin(the file manager) gives a "not enough permissions error". When I try to delete stuff with rm it displays this:

rm: cannot remove 'filename': Read-only file system

What do I do?

EDIT: I backed up the data and reformatted the partition. This completely broke my install and fedora wouldn't open at all. I popped in a live USB, backed up some other stuff and I am reinstalling fedora right now (writing this from the live installer :P)