Looking for 30-60l travel backpack

Hi!

I'm looking for new backpack for myself. I'm new into all that specific backpack stuff but I decided to buy something new since all my trips was with just one school backpack. Mostly my trips are in the mountain area of the country

What I'm looking for? Prize: 30-60 Euro -backpack that I will use for few days (so around 40l??) -Pockets. I prefer to have few smaller pockets than one big one. It should have at least main one, one smaller one inside for documents and side pockets for water etc. - lap belts included - with raincover - without frame i think works better - location: Poland

To be honest I don't know what exactly I am looking for. If you can help me it would be great.

I like going for one week trips to the mountains but I'm not driving a car so I have to take everything with me (all clothes plus some mining equipment and food for few day) using public transport. Many times I had to walk around 3/4km to the hotel (I'm not camping) and around 2km walk to the shop. For now I have Nike school backpack, I think it have 29l, but I'm looking for something bigger and for sure more convenient. Maybe you don't have anything in mind but at least know what I should look for? It's more like backpack to go from place to place, it's not like I will take it for a 40km walk etc.

Currently in my polish stores I'm looking at for example: - Hi-Tec Stone 50L - Campus Polaris 37l - Karrimor Trail 35+5L - Hi-Tec Aruba 35L - Beon XB540 30L (smallest but many good reviews in my local webshop)

Thanks for help! If you need more info I will answer :D