LoCk yOuR FoLdEr yOuRsELf

first select a folder
for ex. i will use a folder name
"rohan" in D:/ drives
D:/rohan/
in the same drive you create a text
file and type

ren rohan rohan.{21EC2020-3AEA-1069-A2DD-08002B30309D}

& save it as Lock.bat

again you type notepad as

ren rohan.{21EC2020-3AEA-1069-A2DD-08002B30309D} .rohan

& save it as Key.bat