With both 16 GB and 32 GB versions being available, users are able to store countless files of various types and formats within the device, however on the rare occasion that further storage should be required, expandable memory in the shape of a micro - SD card slot can be utilised by installing a memory card of up to 32 GB. Android SDK incorporates some core applications: ' An e-mail client attuned with Gmail ' An SMS program ' A Personal Information Management (PIM) program incorporating a calendar and contact list ' A Google Map Application ' A web browser ' A music player ' A picture viewer ' The Android Marketplace client to download third-party application ' The Amazon MP3 store client to purchase DRM free music. Writing reviews on products is one of the quick, easy ways to make money online.