I found the CA code (not always an easy task for some reason):
Article 5. Transcript or Recording
(e) Stenographic notes of depositions shall be retained by the reporter for a period of not less than eight years from the date of the deposition, where no transcript is produced, and not less than one year from the date on which the transcript is produced. Those notes may be either on paper or electronic media, as long as it allows for satisfactory production of a transcript at any time during the periods specified.
Just as a side note: As a scopist , I save all jobs I scope onto floppy disks or Zip disks and keep an index of them for each reporter I have worked with. So far, I still have all jobs backed up I have done for the past 9 years! I noticed the CA Code given,, which may not apply to other states as well. Question: Do the latest steno machines still give a paper steno note record also?