In the Xbox 360 era, game saves and profile data were often stored locally on the console’s hard drive or a USB drive. This local storage made profiles vulnerable to "gamesaving" or "profile editing." A user could download a program (like a modding tool) on their PC, plug in their USB drive, and edit the file to change the flags for achievements from "locked" to "unlocked." It was a rudimentary hack, but it worked—for a time.