Like very many others, I too ask myself the question of how best to make additional backups. Additional means besides RAID1 pool or just parity.
Of course, the best would be a location-independent backup, but unfortunately I only have the location where the server is. Thus, I thought of an external HDD, which is connected via USB. Is there a way to keep it connected but disable the USB port except when the backup is to take place? This way the HDD would not get unnecessary runtime an