Problem copying iPhoto library to external hard drive
I frequently copy my entire iPhoto library to EHD by clicking the library in Finder and dragging to the EHD. However, this time I'm having a problem. I get the message "preparing to copy to Samsung" with a blud and white activity bar. This never goes away so I'm presuming the action has hung? Any ideas please? My storage on the MacBook Air is almost full (hence moving photos).
Thanks
MacBook Air (11-INCH, MID 2011), OS X Mountain Lion (10.8.2)