Burn Fail at 50%

Hi im new to this playing backed up 360 games, I just got my console flashed with the newest extreme firmware and games do work on it, but I am trying to burn copies myself and having troubles, Ive got an external sony DVD RW DRU-820A and I am using imgburn all the settings are proper but when I burn i got errors and it fails at 50% ive got the log i will paste it in here....

I 03:50:49 ImgBurn Version 2.5.0.0 started!
I 03:50:49 Microsoft Windows XP Media Center Edition (5.1, Build 2600 : Service Pack 3)
I 03:50:49 Total Physical Memory: 2,096,104 KB - Available: 1,455,048 KB
W 03:50:49 Drive H:\ (FAT32) does not support single files > 4 GB in size.
W 03:50:49 SPTD can have a detrimental effect on drive performance.
I 03:50:49 Initialising SPTI...
I 03:50:49 Searching for SCSI / ATAPI devices...
I 03:50:50 Found 1 DVD-ROM, 1 DVD±RW/RAM and 1 HD DVD-ROM/DVD±RW!
I 03:53:38 Operation Started!
I 03:53:38 Source File: C:\Documents and Settings\Brian\My Documents\Downloads\XBOX 360\Games\Saw\ZARTHSEEN.dvd
I 03:53:38 Source File Sectors: 3,827,488 (MODE1/2048)
I 03:53:38 Source File Size: 7,838,695,424 bytes
I 03:53:38 Source File Volume Identifier: DVD_ROM
I 03:53:38 Source File Volume Set Identifier: 356fc000MS UDFBridge
I 03:53:38 Source File Application Identifier: CDIMAGE 2.45 (12/06/2000 TM)
I 03:53:38 Source File Implementation Identifier: Microsoft CDIMAGE UDF
I 03:53:38 Source File File System(s): ISO9660, UDF (1.50)
I 03:53:38 Destination Device: [0:0:0] SONY DVD RW DRU-820A 2.0d (F (USB)
I 03:53:38 Destination Media Type: DVD+R DL (Disc ID: RITEK-D01-01) (Speeds: 2.4x, 4x)
I 03:53:38 Destination Media Sectors: 4,173,824
I 03:53:38 Write Mode: DVD
I 03:53:38 Write Type: DAO
I 03:53:38 Write Speed: 2.4x
I 03:53:38 Link Size: Auto
I 03:53:38 Lock Volume: Yes
I 03:53:38 Test Mode: No
I 03:53:38 OPC: No
I 03:53:38 BURN-Proof: Enabled
I 03:53:38 Optimal L0 Data Zone Capacity: 1,913,760
I 03:53:38 Optimal L0 Data Zone Method: Copied From Original Disc
I 03:54:08 Set L0 Data Zone Capacity Succeeded!
I 03:54:08 Filling Buffer... (40 MB)
I 03:54:09 Writing LeadIn...
I 03:54:12 Writing Session 1 of 1... (1 Track, LBA: 0 - 3827487)
I 03:54:12 Writing Track 1 of 1... (MODE1/2048, LBA: 0 - 3827487)
I 03:54:12 Writing Layer 0... (LBA: 0 - 1913759)
I 04:14:02 Writing Layer 1... (LBA: 1913760 - 3827487)
W 04:14:42 Failed to Write Sectors 1926432 - 1926463 - Reason: Write Error
W 04:14:42 Retrying (1 of 20)...
W 04:14:42 Retry Failed - Reason: Invalid Address For Write
W 04:14:42 Retrying (2 of 20)...
W 04:14:42 Retry Failed - Reason: Invalid Address For Write
W 04:14:42 Retrying (3 of 20)...
W 04:14:42 Retry Failed - Reason: Invalid Address For Write
W 04:14:42 Retrying (4 of 20)...
W 04:14:42 Retry Failed - Reason: Invalid Address For Write
W 04:14:42 Retrying (5 of 20)...
W 04:14:42 Retry Failed - Reason: Invalid Address For Write
W 04:14:42 Retrying (6 of 20)...
W 04:14:42 Retry Failed - Reason: Invalid Address For Write
W 04:14:42 Retrying (7 of 20)...
W 04:14:42 Retry Failed - Reason: Invalid Address For Write
W 04:14:42 Retrying (8 of 20)...
W 04:14:42 Retry Failed - Reason: Invalid Address For Write
W 04:14:42 Retrying (9 of 20)...
W 04:14:42 Retry Failed - Reason: Invalid Address For Write
W 04:14:42 Retrying (10 of 20)...
W 04:14:42 Retry Failed - Reason: Invalid Address For Write
W 04:14:42 Retrying (11 of 20)...
W 04:14:42 Retry Failed - Reason: Invalid Address For Write
W 04:14:42 Retrying (12 of 20)...
W 04:14:42 Retry Failed - Reason: Invalid Address For Write
W 04:14:42 Retrying (13 of 20)...
W 04:14:42 Retry Failed - Reason: Invalid Address For Write
W 04:14:42 Retrying (14 of 20)...
W 04:14:42 Retry Failed - Reason: Invalid Address For Write
W 04:14:42 Retrying (15 of 20)...
W 04:14:42 Retry Failed - Reason: Invalid Address For Write
W 04:14:42 Retrying (16 of 20)...
W 04:14:42 Retry Failed - Reason: Invalid Address For Write
W 04:14:42 Retrying (17 of 20)...
W 04:14:42 Retry Failed - Reason: Invalid Address For Write
W 04:14:42 Retrying (18 of 20)...
W 04:14:42 Retry Failed - Reason: Invalid Address For Write
W 04:14:42 Retrying (19 of 20)...
W 04:14:42 Retry Failed - Reason: Invalid Address For Write
W 04:14:42 Retrying (20 of 20)...
W 04:14:42 Retry Failed - Reason: Invalid Address For Write
E 11:54:15 Failed to Write Sectors 1926432 - 1926463 - Reason: Write Error
E 11:54:15 Next Writable Address: 0
I 11:54:15 Synchronising Cache...
W 11:54:19 User opted to skip the 'Close Track/Session/Disc' functions.
E 11:54:19 Failed to Write Image!
I 11:54:19 Exporting Graph Data...
I 11:54:20 Graph Data File: C:\Documents and Settings\Brian\Application Data\ImgBurn\Graph Data Files\SONY_DVD_RW_DRU-820A_2.0d_OCTOBER-18-2009_3-53_AM_RITEK-D01-01_2.4x.ibg
I 11:54:20 Export Successfully Completed!
E 11:54:20 Operation Failed! - Duration: 08:00:41
I 11:54:20 Average Write Rate: 133 KB/s (0.1x) - Maximum Write Rate: 3,360 KB/s (2.4x)


also the game isnt saved in my H:/ drive ive just got an external drive on my pc and that is why it is reading it.. also thanx in advance ppl....