Простой бэкап папок из контекстного меню проводника.

Windows Registry Editor Version 5.00

[HKEY_CLASSES_ROOT\Folder\shell\Backup]
@="Backup"

[HKEY_CLASSES_ROOT\Folder\shell\Backup\Command]
@="WinRAR a -ag-YYYYMMDD-HHMM -ep1 -rr5p -s -r %1 %1"

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