you can enable the Antivirus option under Configuration -> NAS settings
While there, you are able to select a share to send infected files to, with the option "Use quarantine"
Under "maintenance -> antivirus"
you can select single shares or enable the antivirus for all shares,
the Use quarantine will allow you to create a antivirus task and select multiple shares to enable antivirus on.
You can also set a schedule as to when to scan for viruses.
You will also have the option to schedule the virus scan
You can also update the virus definations from here as well
We use clamav for the virus definations