My first backpack was a North Face internal Frame Backpack of which I used for a year, gave it away and purchased a JanSport D3 External Frame Backpack.

After 37 years, I still have and use my JanSport D3 on backpacking trips.

The features I found beneficial:

Sturdy construction.

Comfortable weight distribution.

Front loading.

7 zippered compartments.

Ample external lash tabs.

Free standing.

Lifetime warranty.

The JanSport D3 has done the job, and then some, on all of my 4 season backpacking adventures.