Doing so will ensure that when you re-link your device, the Sync app will download the restored and recovered files from the cloud, creating a new, clean Sync folder. Delete the Sync folder with the encrypted or corrupted ransomware files on your unlinked computer.You’ll need to remove the malware / ransomware infection from your computer (using antivirus software). Make sure your computer is free from ransomware.

Important: before re-linking a computer or device you’ll need to: Contact us to get started with an account roll back. If you need to restore a large number of files, our support team can help you roll back all files in your Sync folder to a previous date or time. This will allow you to select a previous, clean version of any file in Sync, to restore. You can restore individual files or folders using file version history. If you don’t know which device is infected, you should unlink every device. You’ll need to disable (unlink) the infected computer or device from your Sync account. Here’s what you can do to recover your files in Sync, if your computer or device has been infected with ransomware: How do I recover from ransomware that has corrupted or renamed my files?

Dropbox ransomware protection