I have locked my USB using a USB blocker with a password. Now I can not access my USB, I have lost the password and the software will not install. The message it says: You have been denied permission to access this folder.
In such cases, the easiest approach is to try and install the software again and it will automatically detect what was locked or not. From that point, you will have the possibility to manage all folders and passwords because you already have the software installed.
Is it a portable flash and there is no password at all and is already used in same laptop?
Try this: http://www.recoverlostpassword.com