I'm performing background research, and asking questions on mailing lists, in preparation for an attempt to install Linux alongside the existing Windows environment on my Lenovo P51 laptop. What are the most accessible options for creating a backup of the existing drive and its Windows partitions, before I make changes? I've installed several distributions of Linux before, but on BIOS-based systems, and without another operating system installed. UEFI and Secure Boot complicate the situation. I've asked on a Linux User's Group list as well, but any suggestions that subscribers here can offer (or good links taht I might any advice that subscribers here can offer, or links to good references taht I may not ahve found, would be welcome. The laptop also has Intel Management Engine firmware, but it hasn't been configured. It may enable the UEFI menus to be made accessible - but I haven't looked into the details yet.