Something like this can be useful > https://www.transip.nl/stack/ (It is in Dutch, but Google translate will work)
1 TB storage for free, automatic synchronization in the background of files/folders.
Even with a system backup image, it wouldn’t have done much against this because this because a lot of recent files would still be lost. Not to mention Avast actually deleted a ton of my VMDK files (virtual box system images) when it couldn’t move them yesterday even before the massacre that happened today when all the virus chest stuff got deleted.