I am over 80 and have never used a Tablet only Windows on PCs and Laptops and sometimes a Linux. I am hoping to buy a refurbished 7 in Asus Google Nexus. I am baffled since such as Android Tablets have a touch screens and rely on drag and drop, they do not have any Copy and Paste functions. So how do we copy hundreds of MP3, JPG and video files from a flash drive to new folders. I do not want to have to keep going online to use Cloud or Drive storage each time to use such files. Is there a file manager like Explorer among the Google Apps please.