Plug the USB into your PS3, go to Settings > Theme Settings > Theme > Install , and select your USB device. Modern Customization & Homebrew
Ensure your USB flash drive is formatted to FAT32 .
A popular tool for users who want to create their own custom themes from scratch using PC software. Direct Download (Browser Method)
If you bought a theme on the PlayStation Store website (which still worked for legacy purchases) or through a PS4/PS5’s web browser, you could then go to your PS3’s “Transaction Management” → “Download List” to fetch it. This required knowing the exact name of the theme — no browsing allowed.
On December 31, 2015, Sony officially discontinued support for the PS3's online services, including the PS Store. This meant that users could no longer access the store, download new content, or update existing content. The PS3's online features, such as online multiplayer and trophies, remained functional, but users could no longer purchase or download new content.
: Often cited as a "GOAT" theme, featuring Sackboy in a world that changes from day to night in real-time.