u/afrojacksparrow

I am replacing this shed. It is pretty close to an old black walnut tree. Some of the roots are exposed in the current shed floor (concrete 2x2 slabs). I dont really have the option to put the shed anywhere else. I have received mixed opinions from the contractors i have talked to.

Which would be the best option long term? Concrete slab, deck built on buried sonotube posts, deck built on floating concrete blocks. Any other option?