Copying file in /usr/src

[Sikandar]

I need to copy certain folder in /usr/src/linux-heasders/drivers/staging directory.
Attempts made are:
1.cp command:
with and without -t option.
output:
file omitted
2chmod a+wx directory name

output: Permission denied.
3.sudo cp source destination

output:file omitted.

[Sikandar]

Done copying.
Solution:
sudo chmod a+w folder name