Your inventory (default "I") is split into four tabs, first serves as simple backpack, second gathers various riches, in third tab you'll be keeping crafting assets and materials, and the last tab is for holding idle companions.
You'll start with one bag with 30 slots in your basic inventory and 4 additional slots for bags. Smaller bags are rewards in some quests and bigger ones can be purchased for Zen.
You can check details of any item by hovering it, in the tooltip you will see more information:
- Item name
- If item is for equipping and game thinks it's better than one you have on you at the moment you will see Recommended here and Binding mode (Binds on Equip / Binds on Pickup)
- Item statistics (Ratings)
- Enchantment slots
- Item type, class and level restrictions
- Vendor price
- Comparison with currently equipped item
If you are checking item that can be equipped and you have already equipped something in this slot you'll see tooltip of both items.
If you are out of inventory space use your bank available in Protector's Enclave.
Bank by default has 16 slots, more can be bought for Zen.