On Fri, 12 Oct 2018 13:27:10 +0100, Rob Morley wrote:

On Thu, 11 Oct 2018 06:14:44 -0700 (PDT)
wrote:

You've already got easy to operate software. OPen file manager, select
all, copy. Go to your new external usb disc, create a new folder and
paste. It could not be simpler.

That only works as long as you remember to save a fresh copy of anything
that changes, or regularly save everything then de-dupe it.

Or use a backup system that de-dupes below the file level, automatically.

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