Thanks! I didn't think the 'warning' also included a 'pause until acknowledged' feature.I haven't tested this, but I think if you disable the warning using "Warn if PrivateSend is running out of keys" in Settings > Options > Wallet then it will just make the new keys and a new backup without asking you first. You can then use various third party backup options to monitor the wallet backup folder and make new copies to external media as the files change, if necessary.