Windows Surface Pro is a real space hog
The article is misinformed. See the comments for corrections. Basically a 128GB drive is not 128GB but about 119GB. Disk manufacturers use the ambiguity about 1024 and 1000 to inflate specs.
For me the Surface Pro would make a great Desktop/Laptop/Tablet combination if it added a hard disk drive. However maybe you can upgrade the SSD to 256GB/512GB?