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#140
Hello Lourens, and welcome to Seven Forums.
Yes, you will not lose any files that are already on the ext HDD. The system image backup will just be saved in a folder (see note at top of tutorial) on the ext HDD, so nothing will be affected by it.
The image backup of the selected drives will include everything at the time it was created, so yes those will be included in it as well. :)
Hope this helps,
Shawn