I'm reading a lot about the need to separate the master key from additional encrypting or signing keys, like these links:
- GPG subkey layout. Separate keys for C, S and E?
- https://alexcabal.com/creating-the-perfect-gpg-keypair/
- https://www.void.gr/kargig/blog/2013/12/02/creating-a-new-gpg-key-with-subkeys/
As I'm actually planning to use GPG only for protecting my backup data, is it useful to go trough all this procedure?