If you encounter the problem that the steel plate cannot be put into the backpack in the Space Engineer game, make sure that you have deposited it correctly. It may be because the backpack grid is full or the item cannot be put into the backpack. You can try to take out other items from the backpack or Choose a backpack with a larger capacity.
1. First, make sure you select the steel plate.
2. In the game interface, use the mouse to click on the steel plate you want to put into the backpack and make sure it is selected.
3. Then you can press the G key on the keyboard to open the backpack interface.
4. In the backpack interface, move the mouse to the backpack grid, and a + icon will appear. Click it to put the selected items into the backpack.
5. If the above method still cannot put the steel plate into the backpack, it may be because the backpack grid is full or the item cannot be put into the backpack.
6. At this time, you can try to take out other items in the backpack or choose a backpack with a larger capacity.
7. In addition, if there is a lag or bug in the game that prevents items from being put into the backpack, you can try restarting the game.