Yup, that will work just fine and even comes with a rain cover. I'd carry it in a heartbeat to walk the Camino. Backpacks on his forum get waaay overthought, IMO.
You don't need an expensive, technical super lightweight backpack to walk the Camino. You will see pilgrims walking with all manner of backpacks, daypacks etc, cheap ones expensive ones, frame and no frame, some threadbare and well worn and they reach Santiago.....alive! lol
Once I walked the entire Frances, 800 kilometres, with a frameless $35 military style rucksack. I would guess it is about 35 litres in size. It had no hipbelt, no water bladder holder and no side pockets etc. I used a trash bag as a liner for it in case it rained, but it never did (July-August). What I did do, and this is by far the most important thing, far more important than pack choice, is I packed only what I needed, not what I thought I might need. I packed as light as possible. There is no substitute for that. That is important to me as I am no spring chicken and I know my limitations as I have gotten older, and my limitations are increased with each unnecessary pound I am carrying on my back.