i am always worrying about my data in the event of a power loss. My computer system is hooked up to a battery backup (UPS) and automatically shuts itself down in the event of a power failure. But what about my external hard drive? It is plugged directly into the battery backup but its power is controlled by a physical switch. If the computer “detaches” itself from controlling the hard drive before the battery runs out will the external hard drive be okay when the power suddenly cuts out?