Q:

Can I write to a live USB stick?

I'm trying to create a Live USB stick with additional files on it.
I created my live USB using Startup Disc Creator and I've tried to remount /cdrom directory as it described here but it answers
mount: cannot remount rw read-write, is write-protected

I even tried to write to the stick while I'm booted from my hdd, but with the same result:
fgh@fgh-box:/media/fgh$ sudo mount -o remount, rw /media/fgh/Ubuntu\ 16.04.1\ LTS\ amd64/
mount: cannot remount rw read-write, is write-protected

I also tried
sudo hdparm -r0 /dev/sdc

doesn't work.
I would be grateful if you help me with making it writable.

A:

If you use mkusb to build your stick, it will create a persistent partition with the size you specify and use the remaining space for a NTFS partition that can be used by Linux and Windows.

