Here I am Sharing with your one of the old trick to create folder lock.
If you want new trick to lock any fil/folder without software(using batch file) then check this >> https://www.instructables.com/id/FolderFile-Locking-batch-file/
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Step 1: Open Notepad.
First of all open your notepad.
Step 2: Create File
Now goto the follwing link and copy that code in text are.
and save it as locker.bat
Step 3: Run
Double click on file (Locker.bat) to run
Step 4: Move Data in Locker Folder
You can see another folder name with "Secure" which is nothing but your locker folder>
Just put your data in that folder to lock. and then double click on "locker.bat" then Type "Y" to lock.
Step 5: UnLock Folder
Now to unlock that folder double click on "locker.bat" the enter your password ther hit enter.
[Default password is "mohit" to edit it just right click on "locker.bat" then find "mohit" and replace it with your assword]
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RijasA made it!