^^ exactly...but one more thing , i don't want it to convert it to an archive ... i just want that the folder shud be accessible with just typing the password , and then the contents are easily visible ( just like the windows logon

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One more thing if the above can't be done , is there any way out i can make my folder hidden as soon as the HDD is disconnected from my PC and plugged into another PC , and whenever i need to access that folder , i can make it visible !