Hi I have a 250GB LaCie Drive connected via Firewire 800 to my iMac which I have been using happily to backup my work folder for a while until yesterday. Suddenly when I try to copy over the folder from my iMac it fails with the following message: "The Finder cannot complete the operation because some data in "[file name]" could not be read or written (Error code -36)" After it happened a few times on different files (which I initially removed as I didn't really need them anyway) I began to realise this was a bigger problem than just a corrupt file and started investigating. On the next crash I checked out the file in question, which was a .PSD file and managed to open it fine on the iMac. I also have a copy of my work folder on my PowerBook and tried - successfully - to copy the same work folder from my PowerBook to the LaCie Drive by connecting to it wirelessly via my iMac, but when I try to open the PSD file on the LaCie drive it opens with missing information and an error message saying: "This document has been damaged by a disk error. The most likely causes of this error are: a defective disk drive, a defective disk drive cable, or incorrect peripheral cable termination. Some of the pixels in this document may be invalid. Open anyway?" So, in summary: 1. Copying a folder or the offending file in isolation from my iMac to the LaCie drive always fail with the Error Code -36 message. 2. I can open the offending file quite happily on both my PowerBook and iMac. 3. I can actually copy the folder over from my PowerBook to the LaCie, by connecting to it wirelessly via my iMac, but when I try to open the PSD file on the LaCie it opens in photoshop with a "damaged by disk error" message. I've been pulling what little hair I have out in clumps trying to isolate whether the problem is with the iMac or the LaCie drive and I now think it's the LaCie drive itself that's the problem but I would be grateful for any advice or suggestions as at the moment I cannot backup my work!!! PS: I have repaired permissions numerous times on the iMac and have successfully verified both the iMac and LaCie drives.