The Atom usb drive is Imation’s smallest drive measuring roughly the size of a paperclip, and weighing less than an ounce. The 1.5- x 0.5-inch pen drive is also pretty secure due to its password protection feature. The small form factor Atom drive lets you to store up to 8GB of data with its drive partitioning capabilities safely and efficiently managing your information.The Imation Atom drive is available in 1GB, 2GB, 4GB and 8GB capacities with price ranging from $18 to $100.