[atlantis]

Here is my situation. I have an external HD from which I run my PB. I regularly backup the external to the internal so when I take my PB I have all my files.

However I recently I installed Myst 4 on my external drive and I excluded it (using the SD scripts) from getting copied to the internal. I am now taking my laptop with me on my holidays. When I come back I would like to do the reverse from what I do now, ie "update" my external HD with the contents of my internal.

My problem is though that that probably will erase Myst since it is not contained on my internal drive.

Is there any way to avoid erasing Myst on my external drive?

Thanks for your help!