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If you’ve been digging through old forum threads or trying to revive a PlayStation Vita that just won’t connect to Wi-Fi, you’ve probably stumbled across a mysterious file named psvupdat.pup .

But what exactly is this file, and is it safe to use? Here is everything you need to know. In Sony’s ecosystem, .PUP stands for PlayStation Universal Patch (or Update). These are the official firmware files used to update the system software on PS3, PS4, PS5, and—you guessed it—the PS Vita.