External HD freezes when transfering data to PowerMac

I have a 933 mhz G4 PowerMac (quicksilver) running 10.4.5. I got an external USB 2.0 hard drive a few days ago (runs off of a pci USB 2.0 card). The drive is a 200 gig Maxtor Onetouch II.
I can transfer data to the external drive fine. When I transfer data to the external drive, it freezes (or finder. it depends on how you want to look at it).
To make thins more confusing, my drive doesn't doesn't freeze if I transfer the data over the USB 1.1 port on my computer. It transferred all my data flawlessly.
My thoughts are this: maybe there is something wrong with the USB 2.0 card. Maybe the card and the external drive don't get along. Or perhaps the drive itself is faulty.

Pat:
LaCie FW drives are widely used by Mac users and should serve you well.
Another alternative would be to pick up a bare drive and separate FW enclosure... Here are some links to some current ATA drive sales I just found:
Best Buy
CompUSA
Circuit City
Tiger Direct
Here's an inexpensive plastic FW/USB 2.0 enclosure that is FW bootable, handles drives up to 400GB, and has an Oxford 911 chipset, which is the chipset of "choice". (You have to be careful when buying an enclosure; some FW enclosure models are not bootable. One of our more senior Members asserted that he uses this one and it is bootable.)
Here's a whole page of enclosures from Other World Computing, an excellent Mac vendor with a knowledgeable and supportive staff. (Aluminum enclosures are generally sturdier and more expensive.)
Gary
1GHz DP G4 Quicksilver 2002, 400MHz B&W rev.2 G3, Mac SE30 Mac OS X (10.4.5) 5G iPod, Epson 2200 & R300 & LW Select 360 Printers, Epson 3200 Scanner

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EtreCheck version: 2.2 (132)
Report generated 5/2/15, 4:55 PM
Download EtreCheck from http://etresoft.com/etrecheck
Click the [Click for support] links for help with non-Apple products.
Click the [Click for details] links for more information about that line.
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    MacBook Pro - model: MacBookPro7,1
    1 2.4 GHz Intel Core 2 Duo CPU: 2-core
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        BANK 0/DIMM0
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        BANK 1/DIMM0
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        Color LCD 1280 x 800
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        EFI (disk0s1) <not mounted> : 210 MB
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Thanks - I had a 1TB hdd in my macbook for about 12 months but it started playing up a few days ago (I got the question mark folder on bootup) so I bought another 1TB hdd (same model) and started from scratch.
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The ext hdd is my timemachine backup, so yes I have used it often and it has my TM backups - and the usb is a new usb which Ive used a few times.
The issue seems to be when Im transferring files from an ext drive to my mac. I can use it fine and browse (worked find for 45 mins) then I tried to bring my data across.. and it copied a few gig over before total freeze.
This has happened about a dozen times.
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Last edited by Creak (2013-12-17 02:53:31)

Would still be another reminder...
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Edit>
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