And what will you do when you get a hardware wallet? I hope you know that you still need a backup, and that such a device will not mean that all your problems are gone.

When it comes to multiple locations, it’s always a smart solution, of course assuming each location is secure. In this regard, it may be wise to avoid backup on any devices, because in case of theft, thieves will steal the HDD or any other storage device rather than a simple piece of paper (unless they know exactly what they are looking for).

If you are not a person who forgets very quickly, I would suggest you to divide your seed into at least two parts and save them separately. There is also an option to further protect your seed with a passphrase, but this is an advanced option that you can find out more about on the manufacturer's website.