Not to keep harping on what I said earlier, but... I hope you realize, the more you work with it the less your chances are of recovering any data.
It's really not hard to install it into your computer, and that would allow the computer to read the data directly, instead of going thru a USB port.
This gives you a much better shot at recovery. I'll go thru the steps, and if you're still not comfortable doing it take it to a professional.
Take the case apart;
Look for any screws and remove them all. If there are any rubber pads on the bottom chances are there's a screw underneath. Occasionally they're
under a label. I took one apart that didn't have a single screw; it just snapped together.
Find the splice on the side and separate it there with a knife or screwdriver.
Determine whether it's a SATA or IDE.
Look at how the hard drive is connected. The older ones (IDE) will have a power cable
with 4 wires; red on one side yellow on the other side; 2
black ones in the middle. The data cable
is about 2 inches wide and flat, usually gray. Note the red stripe on the side, next to the red wire
on the power cable. That's how you connect them. Simple; red [on the data cable] goes next to red [on the power cable]. That way you'll know which
way they go, altho you'd have to force them to put them in upside down.
If it's a newer SATA drive it'll have a
a.) a red (with black ends) flat data cable about a half inch wide,and a power cable that's similar to the IDE ones.
b.) a single wide stationary plug, where the hard drive plugs into.
So now that you know what you have, remove the mounting screws, and take it to your computer. Remove the 2 screws on the back that fasten the side
panel. Slide it back and remove it. GROUND YOURSELF, with the computer off. Especially if your room is carpeted, either wear a grounding strap or
touch a bare metal part of the computer to discharge any possible static electricity, that might be harmful to those sensitive electronic
Now see if you have the right connectors. For example if you have an IDE hard drive you could just temporarily take the cables from your CD/DVD drive
and plug them into the hard drive and you're all set. You don't need to mount and fasten the drive, it'll work in any position.
If your drive is a SATA and you don't have the proper connectors, either find a newer computer, or get a PCI card. I got one on eBay recently with
both SATA and IDE connectors for $7.