About the long-term backup problem.

What kind of data?

• source code;
• photographs;
• music;
• video;
• mail;
• books, papers, etc;
• administrative data (bank statement, invoices, etc.).

• better if not encumbered by any known patents; flac, ogg, png, etc.;
• popular format: MP3, JPEG, etc.

• need more and more space;

• On line:
  • privacy
  • expensive
• Network Attached Storage:
  • not long-term
• CD/DVD
  • hard to keep backups up to date
• TAPE
  • transfer rates
  • http://www.tomshardware.com/reviews/backing-tape-drives,593.html
  • http://baheyeldin.com/linux/using-tape-backup-on-linux-for-a-home-network.html

On line solution: Nextcloud.

• NAS:
  • all photographs;
  • real-time backup.
• print as much as possible on quality material;
• CD/DVD
  • regular backup, but a little more spaced in time (need to waste a lot of time in order to have up to date backups).

You can distribute your photographs (numeric and printed) in your family.

Before 1999: thousands of analogue photographs (backup on photos album) and 242 photos scanned.

ISO 8601

1. transfer on computer with digiKam;
2. use the KIPI plugin to batch rename all the photographs;
3. change rights: chmod 700 *.jpg;
4. geolocalization with KIPI;
5. tag your photographs.