How did you put the iso on the thumb drive ?
dd if=fedora19.iso of=/dev/sdg1
the bs=512 can be left off - it is the default
where /dev/sdg1 is your usb thumb drive
or some other way
also is the machine you are installing to already partitioned
are you using the partition tool in the installer
i have not used the new installer in 19 very much ( the OLD installer many,many,many times )
go back and rerun the installation
and pay attention to what is on the screen
also read or reread the install guide
it is and has been advisable to just do a minimal install
the very MINIMUM you need !!!
19 is already almost 6 months old , and fedora 20 will be released in a week
there will be a good 4 gigs of updates if you install a full fedora 19 install