Organise files
You can create new folders in your phone memory or on the memory card. This can make it easier for you to find your files. Within folders, you can copy, move, or delete files and subfolders.
Select files .
Create a new folder
In the folder where you want to create a subfolder, select 
> add folder .
Copy or move a file to a folder
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Select and hold the file, then select an option.
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Select where you want to copy or move the file.