JPEG Corruption post transfer over USB External Drive (usb2.0)

Hello
I have two external drives, both support firewire400/800 and USB2.
On the firewire 400 settings no issue at all.
Previously on PPC powerbook, I used firewire 800 and no issues at all.
While waiting for my expresscard34-firewire800 to arrive this week, I am using the USB2 port on the macbook pro to trasnfer a jpeg library (c24gb) to and from, using either the internal 7200rpm sata drive on the machine, or also from the connected firewire 400 lacie 1tb bigger disc.
Whichever solution I use to copy from, all JPEG's that go via the USB2 port on the macbook, any usb2.0 port, get corrupted. I can open in aperture/bridge, or even testing in vista beta or xp and the files are corrupt. But if I transfer via the firewire 400, all is fine.
I can switch around the external drives, I have deleted all partitions and reformatted, and even gone through both fat32/osx-journaled options to no avail. Weird or what?
My only thinking option here is to create a .dmg 24gb file of the whole folder, and move that across, but that is just daft.
P.s. transferring any other type of data works perfectly fine, e.g. .mp3/.doc.xls etc.
Any thoughts on this weird one.
thks in advance!
MacBook Pro Mac OS X (10.4.6)

Hello,
The iMac G4 17" 1GHz only has USB1.1 so it doesn't matter that the MyBook is USB2.0 you'll only transfer at USB1.1 speeds (1.5MBps). As there is no way to add USB2.0 to the iMac G4 ≤1GHz you need to look at a Firewire drive like the MyBook Pro/Premium; incidentally, both of these come with back-up software too.
The iMac G4 can't boot from USB so if your internal drive fails you can't boot the iMac like you could on a Firewire drive.
Personally I do have my MyBook Pro partitioned in to a back-up space which matches my internal hard drive and a separate media file partition.
BTW you have posted in the Intel iMac forum. The users here will be less familiar with the specific issues that iMac (Flat Panel)s may suffer. I'd advise that you post future queries in the iMac G4 forum:
G4 (aka Flat Panel): Intel:
Click image to go to correct forum
regards
mrtotes

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