How do i download pic using usb also my lighting is very dark

Blinking light means your computer still in process reading your data from memory card. Higher capacity of memory card would make the computer need longer time to read it. Just be patient and don't unplug the USB cable.
If you think its too long, then you can unplug the cable data, put off the memory card and open in via card reader so you can download your pictures to PC.

If useful, RATE please !

Use a card reader to download your pics.

If you can get the pics using a card reader, why are you insisting on using the camera and USB cord? Pros always use a card reader.

Make sure the camera is on and pc is selected on the camera screen when connected to the computer. You will need to have PC highlighted and select ok on the camera as this starts the camera and computer to communicate. Once communication established the LCD screen of the camera goes dark and the computer should generate a removable disk drive. Check the System Tray (lower right corner beside the PC time) for Safely Remove Hardware. When you click on it, it should read "Safely Remove USB Mass Storage Device Drive ?:" If you dont see that, then check the Device Manager to see if the camera is recognized as USB Mass Storage Device. The camera uses the driver usbstor.

i used another program i already had on my computer to download my pic's frommy camera

Hi, I guess you are using the automatic mode ( not the "P" mode).
You should enable flash only when there is insuffient light. If you use flash in broad day light, your pic will be whited out. If you dont use flash in dark or low light, your pic will be dark or very dark.
So, when it comes of dark, try enabling the flash. If its still dark, increase the flash compensation (the eV value). If its still dark, increase the ISO number.
Hope these help.
cheers,

You need to download the pics to a PC and them move them over to a USB drive, or in a less common fashion, download them directly to a USB thumbdrive through a PC. PC needs to be used in either case. Firewire is different as it is not a peer to peer connection. I use Picasa from Google to download pics and you can specify where the pic folder is on your pc or USB drive.

perhaps the lab is at fault? if iPhoto displays the pics with the correct dark/light profile then it is likely to be right. You can alter the profile in the edit window of iPhoto but it would seem the lab messed up.

try taking pic with more light if it is to dark it will beep two times just like when memory is full

Are you sure the computer s 'seeing 'the camera this time. USB can be a bit iffy. Leave the camera plugged in but switched off. Repbbit the computer and switch on camera Check 'My computer' to see in there is a 'New drive' indicated.