With the Transcend WiFi sd card you can do many things via autostart script. It is possible to start a ftp server. So you have full access to all files. A http server and telnet is also available.
Via Android or iOS app you can download all media files.
The WiFi card needs extra power with permanent radio. A test produced the following results:
SX220 with a simple time lapse script, 4 second interval time, click "shoot_full_only", full battery
normal sd card => 1800 pictures
WiFi sd card => 1050 pictures