For long-term storage, it’s generally safer to leave a manual film camera uncocked. Keeping the shutter cocked means springs and linked parts remain under tension, which can contribute to aging, creep, or wear over time. If the camera will just sit in storage, releasing the shutter is usually the conservative choice.

That said, it can depend on the camera design. Some cameras—especially certain medium-format models—are designed so parts stay engaged when cocked, and users may prefer storing them that way. There are also camera-specific habits and folklore in the film community, so the best practice can vary by model.

In practical terms: for most cameras, it probably doesn’t matter dramatically, especially on newer or robust models, but uncocked is the safer default unless your camera’s manual or known model-specific guidance says otherwise. Also, if a camera will sit unused for a long time, proper storage conditions and periodic maintenance matter more than this detail alone.