i don't have the sda1 sda device option to mount the USB mass storage device ... I don't know how to go about as the sites automatically assume /dev/sda1 device is present what do i do ?????

We need a little more information. What kind of USB mass storage device are you talking about? What version of Linux?

A more informative title on your post would get you more responses too.

When you plug in your USB device, try the command 'dmesg | tail' (without quotes) and post up the output here. It might give us useful information to help fix your problem.

the device information is

USB Mass Storage Device
Manufacturer: Myson Century, Inc.
Serial Number: 100
Speed: 480Mb/s (high)
USB Version: 2.00
Device Class: 00(>ifc )
Device Subclass: 00
Device Protocol: 00
Maximum Default Endpoint Size: 64
Number of Configurations: 1
Vendor Id: 04cf
Product Id: 8818
Revision Number: b0.08

Config Number: 1
Number of Interfaces: 1
Attributes: c0
MaxPower Needed: 10mA

Interface Number: 0
Name: usb-storage
Alternate Number: 0
Class: 08(stor.)
Sub Class: 05
Protocol: 50
Number of Endpoints: 2

Endpoint Address: 03
Direction: out
Attribute: 2
Type: Bulk
Max Packet Size: 512
Interval: 0ms

Endpoint Address: 84
Direction: in
Attribute: 2
Type: Bulk
Max Packet Size: 512
Interval: 0ms

also the 'dmesg | tail' output is

usb-storage: device scan complete
FAT: bogus number of reserved sectors
VFS: Can't find a valid FAT filesystem on dev hdd1.
SELinux: initialized (dev hdd5, type vfat), uses genfs_contexts
usb 1-4: USB disconnect, address 5
usb 1-4: new high speed USB device using ehci_hcd and address 6
scsi3 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 6
usb-storage: waiting for device to settle before scanning
usb-storage: device scan complete

I'm still not understanding what the problem is. How did you try to mount the device? What happened? What version of Linux are you using?