Quick picture backup to SDcard

Do you have a solution of backup of pictures in your terminal in preparation for affairs such as an error in the terminal or change device?
Recent terminals have an internal SD with the large capacity in the body for pictures, but built-in SD can not be removed. So when you change the terminal, you need to back up your important pictures.
Dropbox, sugarsync, evernote are useful for backup but SD card has a sense of security more them.

1)Haven't you experienced some trouble when you change the terminal?
*It is difficult to distinguish between internal SD and external SD among album in the gallery.
*For ordinary people, the folder management application is too confusing.
*If you are convinced that you finished to backup data to SD, the external SD has no data.

2)This simple application can solve such problem.
*The pictures showed in the gallery can be saved to external SD by only one touch.
*The pictures saved in external SD can be restored to internal SD by only one touch.

Let's back up to avoid losing your precious pictures.