This is fairly straight forward to resolve. You can run the following command and replace /media/username/drive with the path to your drive.

sudo chmod ugo+wx /media/username/drive

If you need to locate the path to your drive, try running

lsblk

It should show all the hard drives mount points

https://askubuntu.com/questions/90339/how-do-i-set-read-write-permissions-my-hard-drives