Portable drive WD Elements Portable will be the best companion of those on the road. The USB 3.0 interface provides maximum speed when exchanging files with this drive. The WD Elements Portable Portable Drive comes with a trial version of the WD SmartWare Pro Backup program, which allows you to save backup copies of files to both the WD Elements drive and the Dropbox cloud system. When the internal hard disk is almost full, the computer slows down. Do not delete files. Free up space on your internal hard drive by transferring files to the WD Elements Portable portable drive and your laptop will work again quickly.