Moving library to external hard drive and get the error "Copying files failed. The disk could not be read from or written to"

Hello,
I'm moving my library to an external hard drive.
I've made sure to use the 'Keep iTunes Media Folder Organized' option when pointing to the new library location.
I select 'File'->'Library'->'Organize Library', I select to 'Consolidate Files', click 'OK' and get ther error message "Copying files failed. The disk could not be read from or written to".
I've read elsewhere that there may be a corrupted file that I need to sequester somehow and perhaps add it back however I'm not certain how I can locate that file because the status window doesn't indicate which file it's attempting to transfer when the error appears.
Any tips?
Thank you,
Greg H
iTunes 10.6.3

OK I figured it out!
It was a dodgy file....I sorted the file folders by date, and as it turned out within the "compilations" folder there was a CD where only about half the tracks seemed to have been copied over. Could not have identified this simply from the time indicated on the finder folder sort, because there were several CDs copied over in the that same minute.
I went back to the original itunes folder, deleted all the files from that CD in itunes, then also deleted all those files from the original disk and the target disk.
Tried the "consolidate library" again, and it completed nicely. 200megs of music and videos.
Very happy to solve this problem after 3 weeks.

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Moving library to external hard drive and get the error "Copying files failed. The disk could not be read from or written to"

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