Backblaze:

In the new macOS 10.14 Mojave update, Apple has made some privacy and security changes with their OS and as a result has changed the way Backblaze behaves after you upgrade to Mojave. We are working on a solution for this, however you will need to follow the below steps to enable Backblaze and back up your Photos, Contacts, Calendars, Safari, Mail, or other Apple items. Please follow these instructions.

I hope this warning doesn’t come too late for some of you.