ST350041
That's a Seagate drive.

Oh, one other thing, the HDD is a 500GB drive with only 75GB stored on it and the SSD is only 120GB.
That's fine. TI can clone to a smaller drive.

If you have an external hard drive, you could save an image backup (.tib) on the external, swap out the HD for the SSD, and then do a restore from the .tib.