A simple tool to backup/restore file permissions is the tool: icacls.exe
To backup the file permissions on the e:\folder\* run the following program:
>icacls.exe E:\folder\* /save E:\cacls.txt /t /c
To restore them later you can run:
>icacls.exe E:\folder\ /restore E:\cacls.txt
Icacls.exe can handle logical drives, network drives and UNC paths.