There are several reasons why redigitizing may need to be done; some media may have been deleted for reasons of storage space or a project may need to be put on one side for a period before editing resumes. An old project may need to be revived for a re-edit or parts of a sequence may need to be incorporated into a new programme. In most of these cases, the original clips may well be digitized as they were logged. This means that if media is ever deleted, it is good practice to keep a copy of the original bins and clips; this does not take up much space (floppies or Zip disks can be used) and it will save much time later.