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Look at the permissions on the external hard drive.
Right click on the drive and make sure you have write permissions.
Hi to you (:
I should have write permissions because I've allready copied some files to my harddisk
and I changed the settings to 'full management' (dunno if its called like this in english, but the literal translation is like that)
so I still don't see why my folder wouldn't copy!!
please help! xD