Solved! Copying files from

Mar 24, 2018
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I have a Samsung Galaxy S7 and I have 152 gig USB I plug the USB into my phone I go into my files and select internal storage I then select all files then I copy go to the USB in my files create a folder called internal storage from S7 and then I copy it into that folder but it is not copying everything it keeps stopping why is this and does anyone have any suggestions on what I should be doing in case I am doing it wrong please help