any advice working with sand?

Hello all,

I've been trying to move this fill sand in my garage with my backhoe, but it really doesnt seem to get enough traction with the backhoe. anybody have to do a job like this? I could easily get in there with my skidsteer but I wouldnt want to drive over that front foundation wall. Anything beats hand shoveling another triaxle load 

Thank you

I did not find the right solution from the internet
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