Fastest way to migrate to a bigger SSD (18.04)

I’ve seen a few postings about migration with older ubuntu versions.

What’s the fastestest way to migrate 120GB (80GB full) to a 1TB SSD unter ubuntu 18.04?

  • live duplicate or via image possible
  • how to extend the new volume on the new SSD?

Because I’ve only a limited time window once I’ve started I’d be happy for suggestions for the fastest way to get new system up and running again.

Thanks for your help!