Add a note / text field to every product IN ADMIN PAGE

[A-DNA]

I am really struggling here. I would like to add a note to every product listing but only for the admin to see, not for a customer. 

For example, we have thousands of different items, but we want to add a note to each product to write where in our storage unit it is, and which box it is in so we can find it. 

I just cant seem to find a simple way of doing that on shopify. Can anyone help? 

[den232]

bump...