Especially if you have a Fleet Carrier, even more space, you don't need to cart them round on your ship.Weapon Components, Graphene, Microelectrodes (to an extent, if you need more space for assets Electical rank lowest as you can scav them off wreckage) Manufacturing Instructions, Health Monitors (again to an extent they're rather plentiful) Ionised Gas, Liquid Compressed Gas, Suit schematics, Weapon Schematics and Power Regulators are always worth stashing if you have the space.