
Synology DS120j

Synology DS120j
Hello, question about the NAS hard disk. In my opinion, this thing works the same way as on a computer. If you have a virus on it or the hard disk goes bye-bye, you are the same as in the beginning... (or you take it away from the Internet Lan cable every time, I mean). Therefore, it would make more sense to connect a normal external USB hard drive to make backups/savings. Or am I seeing this all wrong?