I have been going through some old folders on my hard drive today, trying to sort photos that I never archived correctly. In going through some of the older files (maybe from a year ago) the thumbnail preview will not show up in Bridge. When I open the file up in Photoshop it tells me that the document may be damaged, but then goes on to open correctly. Should I be worried? How do you archive your photos (hard drives, dvd’s, online storage)?