Greetings IT Experts! I know about Amanda, Duplicati and URBackup but none seem particularly robust. I'm looking for something free (and open source I hope) that works well. I'm sure that many products work, but one that has good features, is easy to use and is currently still being developed would be important. I'm pretty sure there is nothing that is going to do hypervisor backups like Veeam would do, but supporting Windows, Mac and Linux is important.
Thank you so much for your advice. Not urgent, just researching to be ready.