Making an encrypted and compressed backup of your files on to DVDs

Recently I decided I should make a permanent backup of my files on to blank DVD discs just in case my backup hard drive fails. I had the following requirements

* The data should be compressed but performance should be favoured over compressed sized. * The data should be encrypted because some of the data I have I consider private information that I don’t want others to be able to access (e.g. gpg private key). However I can’t use my gpg private key for encryption because one of the things I am backing up is my gpg private key and in the event of hard drive failure I would not be able to decrypt my backup. * The data is ~14GB in size so the backup needs to be split across multiple discs. I thought I’d share my solution to this problem.

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