The PS3 Store closed for new purchases in **October 2021**, but previously purchased content can still be downloaded. If you bought DLC before closure, here's how to access it. For new purchases, you must use a PS4/PS5 or web store for cross-buy titles.
Note: You cannot purchase *new* PS3-only DLC via web store anymore. Only cross-buy titles (PS3+PS4/Vita) show as "Free" if owned on PS4/PS5.
Download everything you own *now*. Use a large HDD (PS3 supports up to 1.5TB 2.5" SATA). Back up to PC via **Backup Utility** (Settings → System Settings → Backup Utility) to external FAT32 drive.