We might be wanting to move a 2m x 2m garden shed, by about 1m and maybe
rotating it 90 degrees. It has plywood on the floor and appears to be
resting on paving slabs, not bolted down.

Beyond emptying it of stuff and getting N people to pick it up, any
suggestions for moving it easily? Perhaps sliding or rolling?

What immediately springs to mind are those giant crawler units used for
taking the Space Shuttle to the launch pad... maybe not.

Theo
..