Note: This is the 2017 game by EA DICE, not to be confused with the 2005 game Star Wars: Battlefront 2 by Pandemic Studios.All collectible locations
Search the indicated locations to find all 23 collectible in the campaign and get 175 crafting parts for Multiplayer mode (25 crafting parts per mission). You can collect the crafting parts by going to the Career screen at the main menu. There is one milestone per mission collectibles. None of them are missable. You can get them at any time using mission select. After finding a collectible, it is instantly saved. You do not have to collect them again if you die or quit out to the main menu after collecting them. Not all missions have collectibles. Only 7 contain collectibles out of the 13 missions. They are all found on your path to the main objectives. Obtaining all collectibles is the quickest way to earn crafting parts. You need them to craft "Star Cards" in Multiplayer mode, which are basically your perks/skills and normally are very time consuming to obtain. This gives you a quicker start in Multiplayer. You can craft Star Cards at the "Collection" screen of the main menu by selecting a class and card you want to craft.