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Ayuda > How to power off USB devices on stopping in Win Vista and 7?

When you safely remove a device in Windows XP it powers the device off - for a flash drive its led is switched off and on a portable hard drive it is spun down. However, Microsoft changed this behaviour in Vista and the problem still exists in Windows 7: after you stop the drive on those OSes the hard drive continues spinning and the flash drive LED remains active.

Since all modern external hard drives park their heads automatically when you unplug them, in theory this behaviour shouldn't led to data loss or damage to the hard disk in the enclosure. But in practice, an external hard drive may make strange sounds when you unplug it while running - and strange noises from hard disks tends to make hard drive owners nervous no matter what the cause.

USB Safely Remove has the option to switch the system behaviour on Windows Vista and Windows 7 to power off the connected USB port on stopping an external hard disk. This feature is recommended if you have external hard drives since disconnection with power-down after disconnection is safer.

In order to enable this feature, go to the program options and check the "Power off the device after device stopping" option, then restart the computer to enable the new setting.

In Windows 8 Microsoft returned the same behavior as was in Windows XP, so there is no need in this option and it's not active on this OS.