The products are usually called Wifi game adapters, but they work for PCs, consoles, Blu-Ray players, whatever. No, you can't use the 360 Wifi piece in the PS3, at least without modification. 6
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Copy the update data to the PS3™ system's hard disk drive and perform the update. Update data download procedure. Create a folder on the storage media in which to save the update data. Using a PC, create a folder named “PS3” on the storage media or USB device. Within the PS3 folder, create a folder named "UPDATE".
How to Connect PS3 to Wifi | PC-MIND Dec 06, 2017 Can’t connect to Internet on PlayStation 3