CC, when you make a clone drive, you can make it bootable, and it will be an identical copy of your existing drive, HOWEVER, you can only boot from one drive at a time, so you will need to disconnect one of the bootable drives by pulling the SATA cord. If you simply want a backup copy of photos, documents, etc. on a second drive, don't make it bootable, and just copy-paste, or schedule your backup program to backup the files onto the second drive. You can also put Windows on a jump drive, and boot from that, then any hard drives become storage drives.