Just today I tried partitioning my 2 TB external hard drive with GParted. It all went well, up to the point when I couldn't add anything to the hard drive or look at the contents of it (lost+found folder). It's telling me that I don't have the permissions because I am not the root admin. As the sole user of the computer I'm on, I though that being root admin was the automatic thing, but seemingly not. For future reference, I made one ext4 primary partition, after having made two but realising that I wouldn't need two until in a few months' time.
Any help on how to unlock those permissions would be greatly appreciated!