Also, I am not very technically inclined, so if you can dumb down the details into lay terms, I will be so grateful.. What's nice about these is, if the drive goes bad you can replace it yourself and not have to get rid of the whole unit (like what happened to my Western Digital FW Ext. You can put in your own drive(s) (I bought Seagate drives from OWC) depending on whether you want a single dri..