Sadly, several months ago my wife's computer fell victim to ransomware and we were forced to pay the extortion to retrieve her priceless photos (almost $500). So, I bought Syncovery.
I backup to a FreeBSD server using SFTP, which Windows can't get to so I'm not worried about any ransomware getting to the server and encrypting files. But what I am worried about is backing up files that have already been encrypted by ransomware, thereby overwriting the original unencrypted files. I can use versioning, but if the ransonware goes undetected for several days then even multiple versions will all be encrypted.
Any ideas on a strategy to protect against a scenario like this?