There are 2 ways you can move an item to another album. 

• 1.  Go to the album with the current item in it you want to move.
• Long press the item, and a menu will display. Choose Move media to album
• Click on the album you want to move it to. 
• 2.  Also if you are in the media viewer viewing this item click on the menu item in the top left corner and select Move media to album
• Click on the album you want to move it to.