Ideal for storing loads of music, photos and other stuff, this card just slots in your phone and works immediately.
A tip for Sony Ericsson mobile users who are replacing an existing card- if you have games stored on your existing card, you can't copy them over using a PC. Move the game from your existing card to the phone memory, swap the cards then move from the phone memory to the new card. It's a bit laborious but the only way- if you try to do it using a PC, like I did at first, the games show as locked and won't work.
Hope the tip helps, and I would recommend this card- you can get 100s of tracks on it, and it's a great price.