Cruze3r glide 128 gb has only 114gb free?

[pick44]

I was expecting more free space. What is taking over 13gb of space on this new flash drive I bought?  First time buyer of scandisk. Need your imput

Thanks

Pick

[tapeworm]

This explains it:

http://petapixel.com/2012/10/10/why-hard-drives-and-memory-cards-have-less-space-than-advertised/