Heyho, i have a tiny problem, i will use the rpi zero w as device to submit space on my nas as USB Stick, for test i used local file only.
I used this tutorial withouth the samba things https://www.raspberrypi.org/magpi/pi-zero-w-smart-usb-flash-drive/ and i added the option "removable=1"
the "Stick" works and i get access to files in this file but i always have the problem "its write protected" so i cant add files from windows explorer on it, not really good when u want is as Usb Stick
I use last raspian and did rpi-update
thanks