I read http://www.androidcentral.com/sony-walkman-z-review to catch up and see the OS eats some of the memory. If you feel they should change the memory with each change in the OS or app, I think you should return this fast.
Does anybody out there own a Z-series Walkman?
It's supposed to have a 16GB capacity (NWZ-Z1050B)
but when connected to the PC to transfer files it only
shows 12GB available.
Is this a common Walkman problem
or have Sony shortchanged us 4GB???