@Tech: What you are saying doesn't make any sense to me. How could you make a backup of the data if it gets deleted BEFORE
My poor English...
I have a notebook with 250Gb of disk on 6 partitions.
I have an USB drive of 640Gb for backup.
So, I want to separate 250Gb of the second one and make a full backup of my notebook disk.
Problem, when I do that, all the other partitions in the backup drive are deleted, i.e., the programs delete all the partitions on the 640Gb drive to copy only 250Gb, letting the other space as non-partitioned. Of course, the other 390Gb is used with other backups, videos, etc.
Got it?