How should I permanently store digital photographs?

Bharat Jukar

Distinguished
Feb 8, 2012
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Good afternoon!
Kindly let me have your advise on the following:
1.Which is more safe to save the Videos/ pictures ( DVD or portable hard disc)
2.Which between the two is more long lasting ?
3.The picture/Video quality will be better in which equipment (DVD of portable disc)

Please revert

Regards,
Bharat
 

How many pictures are we talking about? 100GB or more? Or less?