I really enjoyed hideto84's Big Leather Backpack however it felt like there was a lack of progression for you could buy a common soul gem and make the best Backpack at lvl 1. This will give you the progression with this mod needed.
The brown Backpacks were unchanged except for 1 bug fix on the value of the small backpacks. However the black Backpacks are now much better but harder to craft.
If you already have hideto84's mod please endorse it and if you want replace it with this version of it just to add a felling of progression. If you are using one of hideto84's Backpacks before you download this it will become this mod's version of it. If you do not like the changes I made you can easily un-download this script free mod and re-download hideto84's version.

Lessor- 60 Carry Weight
Common- 100 Carry Weight
Greater- 150 Carry Weight + 50 Stamina
Grand- 200 Carry Weight + 75 Stamina