U disk capacity becomes smaller, repartition

Today want to copy a 3G genome, 4G pny u disk is empty, but half to find capacity is not enough, usable capacity into 1.3G. Suddenly puzzled

Remember a few days ago a friend lent me a plate, an estimate is to install the system. With Disk Management A look, sure enough partitions, the remaining 2.6G empty there. But Disk Management right click did not find the delete partition option, but the Internet under a PQ hard disk partitioning tool (http://www.downxia.com/downinfo/18154.html), Delete the 1.3G partition, the free space into 3.9G, and then will be free again all partitions, the volume name changed to "removable hard disk", in the point of the toolbar application (some point oh, otherwise equals nothing to do), so became the previous.