It would only work for offline titles, any online game worth its salt would store all of that information server side, besides you don't need a fancy dongle to do this, just a little programming know how and a USB stick.
You cannot unlock trophies with this, the trophy has to be triggered by a live event, the only time that isn't the case if for poorly coded titles (SOCOM on PS3 as an example, where loading an edited save have all trophies), giving yourself trophies on hacked ps3's is different too, because you were in actual fact editing the trophy store on the ps3's database then syncing that to PSN, because of that additional checks were put in place so even if you had full access to editing the PS4 HDD files you would at best, get yourself banned.
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