Hi all

when insert the USB HD, the system crashes and i have to restart it with the restarting button.

any idea ?

Hardware Overview:
Model Name: Mac
Model Identifier: P35-DS3
Processor Speed: 2.4 GHz
Number Of Processors: 1
Total Number Of Cores: 4
L2 Cache: 8 MB
Memory: 4 GB
Bus Speed: 1.07 GHz
Boot ROM Version: MP11.005C.B08

TSSTcorp CD/DVDW SH-S182M:

Firmware Revision: SB03
Interconnect: ATAPI
Burn Support: Yes (Vendor Supported Drive)
Profile Path: VendorSupport.drprofile
Cache: 2048 KB
Reads DVD: Yes
CD-Write: -R, -RW
DVD-Write: -R, -R DL, -RAM, -RW, +R, +R DL, +RW
Write Strategies: CD-TAO, CD-SAO, CD-Raw, DVD-DAO
Media:
Type: DVD+R
ID: MCC 004
Blank: No
Erasable: No
Overwritable: No
Appendable: Yes
Write Speeds: 4x, 8x, 12x, 16x, 18x
NVIDIA GeForce 8500 GT:

Chipset Model: NVIDIA GeForce 8500 GT
Type: Display
Bus: PCIe
PCIe Lane Width: x16
VRAM (Total): 512 MB
Vendor: NVIDIA (0x10de)
Device ID: 0x0421
Revision ID: 0x00a1
ROM Revision: NVdarwin 1.2.3
Displays:
Display Connector:
Status: No display connected
SAMSUNG:
Resolution: 1680 x 1050 @ 60 Hz
Depth: 32-bit Color
Core Image: Hardware Accelerated
Main Display: Yes
Mirror: Off
Online: Yes
Quartz Extreme: Supported
Rotation: Supported

Serial-ATA Bus:

WDC WD6400AAKS-00H2B0:

Capacity: 596.17 GB

USB High-Speed Bus:

Host Controller Location: Expansion Slot
Host Controller Driver: AppleUSBEHCI
PCI Device ID: 0x293a
PCI Revision ID: 0x0002
PCI Vendor ID: 0x8086
Bus Number: 0xfd

Regards