I currently have Time Machine backups going to an external USB hard drive. I'm wondering if it's ok to eject the TM drive without losing the backups. I'm hoping that I can remove the drive (when it's in between backups, of course) then reconnect it, and it will continue the backups as before, updating anything I did when it wasn't plugged in. Please correct me if I'm wrong. I use a MacBook Pro with 2 USB ports. It would be nice to not have my Time Machine drive plugged in all the time. Thanks.