ROLLS post was idiotic...
NEVER open a hard drive that you would like to use in the future, there is a chance it will not work again.
I can throw a mechanical hard drive at the ground and it will still work... I have done it before.
and a 500gb WD drive is not a few hundred, it's like $40-$60.
Also, you don't need to solder anything
ANYWAY, to answer your question, that is a Serial Advanced Technology Attachment, known as SATA.
It is the predecessor to EIDE drives and the standard for newer computers.
You CAN plug it into your computer and use it as an internal HD granted your motherboard has SATA ports. You will need a SATA cable to connect to the mobo.
And possibly an adapter if your PSU doesn't have them by default.
IF on the off chance your motherboard is pre-2005 and doesn't support SATA, and you want to make the drive internal, you can use a SATA to IDE adapter. That would look something like this...
If your motherboard doesn't support SATA and you would like to use your SATA drive externally, You can purchase an adapter that will allow you to use it as a USB drive, like a flash drive.
That setup looks like this. It is self explanatory where the cables plug in.
So YES, you can connect it to a computer to get files off of it, and it is a SATA hard drive. If you need any more help, feel free to ask.