I think they started at the top and then built down

Nobody has so far given you a serious answer, so:

Cutting - They only had IIRC bronze, which is not enough on its own to cut through the granite. However using sand to add friction makes it cut significant faster/easier.

Moving miles - Boats are incredibly capable of carrying heavy loads with minimal energy expenditure to move said boat. Using logs and levers also goes far.

Getting to the too of the pyramid, that's a little more of a mystery. But there is evidence they included ramps within the structure as they built the bigger ones as they went. And IIRC the smaller ones had pulley systems going through the center.

It doesn't require fancy tech, just of patience and application of basic physics.

Here is a guy using some of the basic movement techniques in his backyard with multi ton stones:

https://www.youtube.com/watch?v=Ewtm1s02Ih8

He who cast the first stone built the pyramid

Lifting is the hard part, you can move blocks short distances on rollers, long distances on barges, really short distances by a dozen men pushing

If you take the heaviest stone and divide it by a reasonable weight to walk long distances- say 20lbs, you find you need a few thousand people to carry one stone. You need several thousand ropes for each worker, but again each rope only needs to lift 20 lbs of the whole.

Modern estimates put the number of workers at 10,000. So they just had to carry them.

It's no wonder they didn't document it. Lift stone and walk. What's the big deal?

Slavery: It get shits done.

Moving material gets done via cart, or rolling on top of logs. I had heard various theories for how they got the big bricks up, from rolling up a dirt pile (put into place by, you guessed it.) to building a waterproof chute with the bricks in it on a raft, and just filling the chute with water to make the raft go up.