SD! won't start copying when ignoring folders

[GMacSpark]

Hi,

I'm attempting to do my first backup with SD!, from my Boot drive to a Mac OS Extended (Journaled) partition on my second internal (SATA) hard drive.

All seems to go OK if I simply do a straight "Backup - All Files", but my problem is that there are some very large folders that I want to exclude from the backup (Movies, Music etc - I back these up to a different drive).

So I made a script that ignores these folders. But when I run it, SD! goes through the initial stages of its process (the upper section in the progress box) and then when it gets to the actual copying, it stops and says it can't copy any files - 0 files copied.

I suspect that after it erases the partition in the initial stage, it may be setting the partition's permissions to "read only", and hence the copy fails. Does this sound feasible?

Any words of advice?

Powermac G5 Dual 2.0GHz; 4.5GB RAM; OS 10.4.8

Thanks in advance!