Hi, My son downloaded about 500 games and filled a 64GB card on his kindle fire (kids edition, he used the Fire for kids app). I am trying to use ES explorer to delete them (never used before). When I go into large files, select lots to delete, click delete then a "hint" pops up prompting me to choose the root directory .... but when I click select nothing appears in the "open from" window so I can't choose the root diectory or anything else. I can't try another file explorer as wifi is disabled until I free up some space.

Help