I’ve got a Deuter Futura 22L that I daily drove for YEARS in the city, backcountry, road trips, you name it. It’s dirty, sure, but structurally it’s the same as the day I got it. I broke a couple of the buckles and Deuter sent replacements without batting an eye. I think my favourite part is that the fabric can withstand a light rain without the contents getting wet, but then for a downpour it has a built in rain cover that folds out of a flap on the bottom. The only reason it’s not my daily anymore is that I just felt like switching to a less rugged bag to save some weight on my bus commute - if I was still walking every day I would still be using the Deuter for the spinal support.

If you need something bigger, I can also recommend Osprey. I’ve had one of their 60+12 (the 12 is a detachable daypack) mountaineering packs for international backpacking since 2017 and it’s held up great. And I was a migrant fruit picker back then, and NOT gentle on my gear at all. I haven’t had to test the warranty yet, but Osprey are legit and you’ll see them mentioned in this sub often.