A-Hackers-Guide
PlayStation 1

Memory cards

Memory Cards

The PlayStation has no internal storage for game saves, so all progress is written to a removable memory card inserted into one of the two front-panel card slots. Understanding how these cards work helps you preserve saves and avoid the frustration of lost progress.

Capacity and Blocks

Saves are measured in blocks. The official Sony memory card holds 15 blocks of save data. Each game uses one or more blocks depending on how much it stores, so a single card can fill up surprisingly quickly if you play several save-heavy titles. When a card is full, you must delete an old save or move it to a second card.

Official vs Third-Party

Sony's official cards are the reliability benchmark: they store the standard 15 blocks and tend to hold data well over time. Third-party cards came in many forms, some matching the official capacity and others advertising far larger storage by splitting their space into multiple virtual cards you switch between with a built-in menu.

TypeCapacityNote
Official Sony15 blocksMost reliable
Third-party standard15 blocksQuality varies
Third-party "multi"Many virtual cardsMenu-based switching

Low-quality third-party cards can corrupt or lose saves without warning. For irreplaceable progress, keep a backup on a second card.