A quick Windows/Mac search will find your manual much quicker than ferreting through boxes in your attic.

I don't have boxes whit manuals in my attic. Nor do I scan them for digital storage. But what I do is to keep them as much as possible in the room/environment where I may need them. This reduces the search to a minimum.
  • Those of the kitchen and appliances are behind the cabin plinth
  • Those of the machines and tools are in the shed.
  • The printer's is underneath
  • That of the TV and radio is in the box below
  • And so on. and so on.

https://dutchypatterns.com/