Hello. I am using a Seagate FreeAgent USB External drive and Time Machine to back up my MBP. On average, I backup once a day. To keep the drive in good condition for a long long time, is it better to disconnect the drive physically after use? So far, I just unmount the drive from the desktop. However, to use it again, I have to physically unplug it from the USB port and then plug it in again. (Is there another way without unplugging?) This may cause a loose connection in the future. This has happened to my USB Flash Drive. Thanks.