Folder access is denied

Please help me I realy need to help..
I have a folder that is very important for me .. I think that something is wrong with it when I wanna open my folder, it dose not open and there is a message that says:
file is not accessible access is denied..
what should I do?
I know that it is my father fault cause he does not wanna that I open that folder...
I didi every thing that I thought might help but I could not fix my file...
 
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