[RyT]

I guess it's down to choices, some prefer bubble wrapping inside, as it provide uniform cushioning and protection with easy to seal on the flat surface outside. The surface outside is also more durable.. Disadvantage is if it's bubble wrapped too long it leaves marks. This can be prevented by wrapping a brown paper like buttah's method.. Also padded envelops have bubbles facing in..

As for if it is outside, damage will go towards the bubbles first, but uneven protection I guess... This method is good for multiple packages ship together which minimises tendency of items sliding against each other..

Did a bit of google search and found these reasoning lol

anyways, every package I received so far has bubbles inside like what matrix6 said