how can update new version

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According to the screen shot, you need to free disk space. See if anything here helps. 

Disk space - How to check the storage on your iPhone, iPad, and iPod touch.    

 Disk Space – Free Up    

 Disk Space – Free Up (2).  

 Disk Space – Free Up (3).   

 Disk Space - Free Up (4)        

 Disk Space - Free Up (5)