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Re: Backing up N5200 to external USB drive
Yes, the N5200 is running a real OS, so cp isn't part of that crappy busybox and of course it supports "cp -u".
But instead using cp you should use rsync, as this tool was just invented to do things like this.
At least for the N5200 there is a rsync package available.
With rsync this a one-liner:
rsync -a --delete /this/is/your/source /raid/data/usbhdd/sdf1
where /raid/data/usbhdd/sdf1 is your mounted USB partition.
Andreas
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