TA20831 Why do I get error code -50 when copying from one external drive to another in OSX Lion 10.7.4?

Any pointers (apart from 'googling') would be appreciated. Thanks

I have not yet been able to figure out what the problem is. I have checked the iMovie and other forums, both here and elsewhere on the Web, and I have not come across a single post that relates to this problem. The files I have been trying to copy are still on the external drive, and I have used the drive to store and transfer other files to and from my TiBook with no problems. But those three iMovie files, which will open and play from the external drive, STILL won't copy back onto my hard drive.
The one thought I had involved disk space: Maybe a significant amount (30GB or more) of free space needs to be on the target drive when copying such large files. When I get to a point where I can delete some of the larger files I have been tinkering with, I'll try again.
In the meantime, any insight from anybody into this issue will still be appreciated.

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-36 I/O Error copying from one external drive to another? Ugh...help?!?

Hardware:
Apple Powermac Dual 2.5 GHz G5
512 MB RAM
External Drive 1: LaCie 250 GB (Firewire 800) (contains 150 GB data) (formatted MacOS Extended)
External Drive 2: LaCie 400 GB (Firewire 800) (contains NO DATA) (formatted MacOS Extended Journaled)
Software:
Mac OS 10.4.3 (Tiger)
I've sucessfully run the firmware updater (http://www.lacie.com/support/drivers) "LaCie Update Tool v1.3.3" for both LaCie drives to the latest version - 107.
Background:
Before I updated to the latest firmware and before I changed Drive 2 to journaled, I had problems copying files from both drives to the other. I get this error: "The Finder cannot complete the operation because some data in "filename here.ext" could not be read or written. (Error code -36)."
I did some research (http://www.appleerrorcodes.com/) to discover that Error -36 is an I/O error.
My goal is to reformat Drive 1 (250GB) to journaled. After some reading, I have decided to do that for both of my external drives.
Question:
I'm at the point now where I need to copy the data from Drive 1 to Drive 2 and this error is still occuring. I need to 1) understand why it's happening and 2) find a solution so I can copy this data from Drive 1 to Drive 2.
Future Question:
Once the data is copied, I will then reformat to journaled. I'm then going to decide between scheduled backups or setting up a RAID, but I'll post this issue as a separate question. I first need to understand and fix this copy I/O stuff.
THANKS!
Dual 2.5 GHz G5 Mac OS X (10.4.3)

Using the Disk Utility with the Mac OS, I just realized that I can't verify or repair disk permissions on either of these external LaCie drives. I can on my startup internal disk, but not the external ones. Any idea why?
I replaced the FW800 cables, but I still cannot copy from one external to the other. The connections are like this:
Drive 1 (250 GB) is connected to the back of my G5 via FW800.
Drive 2 (400GB) is connected to Drive 1 via FW800 cable.
I'm in need of some help!
Robert
Dual 2.5 GHz G5 Mac OS X (10.4.3)

Error copying from one external drive to another

Hi - I am trying to transfer three large iMovie files from an external Firewire hard drive to an external USB 2.0 hard drive. I have the USB drive connected to my 1GHz TiBook through a PCMCIA card. I have the Firewire drive connected at the TiBook's Firewire port. When I try to copy the files, I get about 1/4th of the way through and then I get the following error message:
"Sorry, the operation could not be completed because an unexpected error occured. (Error code -1309)."
The three files are about 25GB each, and the problem happens with all of them. I tried copying them altogether and each one individually. I also tried connecting the Firewire drive to the Firewire port on the PCMCIA card. Same problem no matter what I try. I also tried copying my iTunes music folder, which is about 25GB as well, in case file size was an issue. That copied with no problem.
This is driving me nuts. Why won't these particular files copy? What is "error code -1309"? How can I resolve this issue? Any ideas?

I have not yet been able to figure out what the problem is. I have checked the iMovie and other forums, both here and elsewhere on the Web, and I have not come across a single post that relates to this problem. The files I have been trying to copy are still on the external drive, and I have used the drive to store and transfer other files to and from my TiBook with no problems. But those three iMovie files, which will open and play from the external drive, STILL won't copy back onto my hard drive.
The one thought I had involved disk space: Maybe a significant amount (30GB or more) of free space needs to be on the target drive when copying such large files. When I get to a point where I can delete some of the larger files I have been tinkering with, I'll try again.
In the meantime, any insight from anybody into this issue will still be appreciated.

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Hi all, I bought a 3tb TC and backed up about 1.3tb worth of data onto it from an external HDD, I then formatted the external HDD to FAT 32 as I found out that TC does not like to work with FAT 32, no matter, the hard drive ois fixed now. However, when I go to copy all the data back onto the external HDD. i get "an unnexcpected error occured error code -50" or something like that, but the error code is definetly 50. I got this error when trying to copy the movies through, they are MKV files, I checked all the names and I dont think there are any problems with them.
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Cheers

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TA20831 Why do I get error code -50 when copying from one external drive to another in OSX Lion 10.7.4?

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