It is the confusion created when Microsoft announced support for MicroSD external memory in Windows Phone 8, the new update of the mobile platform, leaving the field open to speculation on the use of the same memories. In a slide from Microsoft, you can read “Support Micro SD” with specific “Pictures, Music, Video and Software”. Some have interpreted this item as the ability to install the app on a MicroSD memory card and then transfer to a new phone and allow the phone itself will open the app, they would work, without needing to reinstall them, or what was going on – more or less – Windows Mobile.
Apparently not exactly the case: you still need to install the app in the phone’s main memory to make it work, but you can copy the installation file on your MicroSD to install them on any other phones. This is a feature designed primarily for businesses / organizations that do not want to switch from Windows Phone Marketplace for custom applications. The same reasoning applies to developers who do not want to publish your app now, but who want to share it with people interested in trying it.
It is still important; therefore, when we go to buy a new Windows Phone 8, keeping in mind the size of the phone’s internal memory if you intend to install a large number of applications will be possible to offload the only effectual music, movies and photos on your card memory.