Dave Taylor said:
Just a reminder. ALL hard drives WILL FAIL!!! You just don’t know when it will happen. sooner or latter. It will fail.
Which is precisely why I mentioned I have several backups. There are 3 ‘external’ drives on my desk today, as I write this, and the computer has 3 disks inside it. There’s another ‘external’ disk upstairs for my wife to use as backup.
Whether you use CDs, DVDs, SDs, or real disks, they will all have problems eventually. Keep upgrading - every 10 years take your stuff and copy it to a new medium. I think I have 6 copies of my 2005-2011 photo files on these various disks. Probably only 2 or 3 copies of the 2012/2013 photos, and of all the videos.
The clouds can be a place to store your stuff, as long as you have your own copy at home.