[Q] [q] galxy mega 6.3 19200 topic

Hello there every one I just rooted my mega and went trought setting storge and saw misc files taking up to 7 gig I cant delete them I even go to my files to see them it just wont opend it shows me device stoarge and then nothing I have done a reset to factory several times but nothing changed I cant even make a screen shot to show you nor can I download a program hellllllllpppppp plzzzzz