In Red Dead Redemption 2 you must recover the stash from 4 homesteads for the Breaking and Entering trophy or achievement. This guide shows the locations of all homesteads and their stashes in RDR2.

There are 7 homesteads but you only need 4. So you can pick and choose which ones you want to do. The last one at Willard's Rest only becomes available in Chapter 6. The others you can loot as early as Chapter 2 and it is recommended to do them early on. In the late game some inhabitants of the homesteads may no longer be there which means you can't interrogate them for clues. Or you may have killed them already which would only complicate things.

Make sure that you loot EVERYTHING and not just the stash. The trophy tracking for this appears to be a bit off. The first time I did this it didn't unlock the trophy because I only went for the stash and didn't loot the rest.