It is often much cheaper to upgrade than buy a package. Can you upgrade the ram later if you need to? I have a very old Thinkpad that I upgraded to 16gb ram som

It is often much cheaper to upgrade than buy a package. Can you upgrade the ram later if you need to? I have a very old Thinkpad that I upgraded to 16gb ram some time ago and it works fine for everything I need, except editing gigapixel images (files sizes in multiple gb). I have a 64gb ram workstation for that.