ITunes wont copy to Lacie external hard drive-unknown error-50

All goes well until I choose "Consolidate Library" from advanced menu in iTunes.
Unknown error -50 appears every time. Plenty of free space on the Lacie and I can move single items so no prob with fire wire connection. What can I do ?

You could try (provided you have enough diskspace) to 'consolidate library' to a location on your internal hard disk and then copy the folder over via the finder.
Good Luck!

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