...files on the disk, but you can't save changes to fileso n the disk. Back up the disk and reformat it as soon as you can" Strange, on a new mac pro's stock hd. So... How exactly do i restore this hd, which does not have the boot os but is just used for storage, to a proper state? -should i delete my time machine hd (which is my only other hd big enough) and copy the files from that currupt hd to my time machine hd, -or just reformat the currupt hd and restore it using the time machine program? -and if i should use the time machine program, HOW DO I DO IT? I can't loose this data... and why the he** did this happen to begin with? should i get this hd replaced under warrantee? can i? should i not trust this hd? thanks, r.