The limited items that you are allowed to carry in Resident Evil 7 requires you to efficiently manage your inventory.
You can however, increase your inventory space by finding Inventory Slots that are obtainable throughout the game.
Each Inventory Slot appears as a survival backpack and increases your carrying capacity by four.
Collecting all Inventory slots grants you the Trophy In The Bag.
The first Inventory Slot is found near the cassette recorder where you save your game in the Old House.
It is the old equipment shed with a bridge leading to it.
The second Inventory Slot is found upstairs from the main hall in the master’s bedroom. The third and last Inventory Slot is found once you arrive at the Old Ship.