I just noticed when I click on computer from the Go dropdown I get one icon which is an image of a hard drive labeled Macintosh HD like I have always had but there are four more white blank icons with a folded corner labeled Macintosh HD as well. I've never seen these before and am wondering what they are. When I click get info they come up with the same info as the actual hard drive Icon but different dates and times from early April. Can anybody tell me what tehese are and can I delete them? Thanks