A:AnswerI'm not sure I understand the question? But basically you're saying you have a 4 gigabyte SD card. Any micro SD card will work yes you can go to a 16 gig or 32 gig. It's going to give your phone more storage to be able to move your apps music photos so you don't suck your phone memory drive.
A:AnswerThe number of songs it can store is dependant on the amount of compression used when creating that song.
Yes, memory cards do wear out. Flash memory has a limited number of changes that can he made to it before it is rendered unusable. The specific number of changes is manufacturer specific. Also flash memory is sensitive to cold weather.
