1 - It´s possible to backup all the content/configuration on my sdcard so I could put it in another sdcard and use it just like it was the original????
Sure ... i use Win32DiskImager. Just insert the sd card into your PC select "Read" to create and .img file ... then insert a blank sd card and select "Write". It will (should) be an exact mirror copy (or clone) of your other sd card with same content/configuration.