iTunes data location

I’ve had a bit of an issue regarding storage space in my laptop. I had a whole backup for my previous iPhone on it that i don’t need now. Can anyone tell me how to get to the location of the backed up data so that i can delete it and gain back some space on my phone.

Start iTunes
Edit,Preferences, Devices
A list of the backed up devices is displayed, delete the one(s) you don’t need
HTH