So I tried this before mounting:
Code:
sudo touch /media/phoenix/test.txt
and file is there:

Code:
ls -la /media/phoenix/
total 8
drwxr-xr-x  2 root root 4096 Nov 15 23:38 .
drwxr-xr-x 10 root root 4096 Nov 12 23:25 ..
-rw-r--r--  1 root root    0 Nov 15 23:38 test.txt
After mounting:

Code:
ls -la /media/phoenix/
total 8
drwxr-xr-x  2 root root 4096 Nov 15 23:38 .
drwxr-xr-x 10 root root 4096 Nov 12 23:25 ..
-rw-r--r--  1 root root    0 Nov 15 23:38 test.txt
And file is still there.