Shed base
You always lay paving to a fall, unless there is a very good reason not to do so (maybe you're using permeable paving).
As for the direction of fall, I can't actually see your shed from here, so I can't say which way the shed base should slope. Only you can decide that be taking a look at where the water will go.
As for the direction of fall, I can't actually see your shed from here, so I can't say which way the shed base should slope. Only you can decide that be taking a look at where the water will go.