If the attic is not large enough for a person to move around try tying a rope to the vacuum.
How to remove old attic isulation.
Gradually pull the vacuum toward you as it sucks up the insulation.
To maneuver around the attic safely lay large planks at least 6 inches wide across the joists.
Place a large tarp wherever you plan to unload the filled garbage bags.
Use the 6 inch 150 foot flexible vacuum hose to draw the insulation from the attic into large bags for disposal.
There are several different types of insulation so you should first identify the type you have in your attic.
Use the commercial vacuum hose to remove the insulation and clean the attic floor.
Use the shop vac to remove remaining insulation after raking and vacuum the attic floor without commercial vacuum usage.
For walkthrough areas place a sheet of plastic over the opening and secure with tape.
How to remove blown in insulation.
Rent a powerful hepa filter insulation removal vacuum from an equipment rental yard.
Gather the right equipment.
Set up tarp and trashbags.