I have read through the article on how to migrate to a different physical location but I only need to move to another physical hdd on the same machine. Can I just stop the service and move the folder with my data? I also need to increase the allocated storage(1.5 - 6tb). Sorry if the question is stupid, I am a bit new.
Not a stupid question at all. And welcome to the forum!
Yes, you can just copy the data cross (but you need to make sure that the node is stopped if you do that). That will likely take a few days.
If you’re not in a rush, it’ll probably be easier to just follow the node migration instructions
Let us know if you have any difficulties 
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The same guide can be used for the local migration too, you just do not need to share folders via network, use the drive letters and paths directly.