Here’s how to start accumulating some materials.
TRICKS TO ACCUMULATE MATERIALS AND RESOURCES IN THE DIVISION
Method 1: the toolboxes
Below I propose a video published on the IGN Youtube channel that shows a fairly simple method that can be used from the early stages of the game, to accumulate material and resources for crafting without spending anything. Basically, it is an exploit thanks to which the respawn time of the toolboxes is reset, which is normally 1 hour. Obviously, there is a good chance it will be fixed with a patch in the future:
At this point, you just need to know the position of all the cassettes that contain the various types of material. In this regard, The Division cheats will certainly be useful to you, which shows, for each type of material (parts of weapons, electrical parts, etc.), the position of the various boxes in the districts of the city.