How do I save my skinned mesh rig in my roblox to blender?

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#1

I have uploaded a skinned mesh in roblox I want to modify it back to blender, but the problem is I Lost my skinned mesh file in my computer .

Roblox has only Export selection for models but it only saves as obj which makes the mesh only 1 piece and no rigs,

(PLEASEEEEEE I’VE BEEN SEARCHING FOR 1 YEAR FIX FOR THIS)