How does Laravel decide where to save temp files?

I am using this image library that uploads images to S3.

At first it saves the image as a temp file on local machine, then it uploads it to S3.

My issue is that using certain functions temp files get uploaded to C:\\xampp\\tmp/ and using other functions the temp file gets uploaded to C:\Users\myUser\AppData\Local\Temp.

My question is that where does this gets decided? and how to configure it?

I'm using Win10 machine.

via Chebli Mohamed