cannot move files to second sata hard drive

[hthi]

debian 8 64bit
gparted

Done this:
connected one more sata hdd to the desktop
formatted the hdd using gparted
I have to enter sodu psswd in order to start gparted

If I right click in nautilus and copy a file on the system hdd, then I cannot move it to the second hdd. If I right click then paste is greyed. I cannot create a new folder either.
On other gnulinux systems, I have not encountered this matter.
A window also prompts me to mount the second hdd and enter the sudo psswd.
After that files stays not movable to the second hdd.

Nautilus permission properties about the second hdd says
owner root access create delete files
group root access access files
others access access files.

You cannot select options

How do I format a hdd such that I can use it for files?
Is it an extra security property on debian 8 64bit?

Thank you.

[Dai_trying]

You can change the ownership of the mounted system using the following command

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sudo chown username:username mountpoint

and entering your password.
You will need to substitute "username" with your own username and substitute "mountpoint" with your mountpoint name, mountpoint name could be either the name (if given one) or UUID but can be determined by looking in the output of df to see the mountpoint("Mounted on" column) of your newly created hdd (must be mounted first)

HTH

[hthi]

Thank you. I could not get

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sudo chown username:username mountpoint

to work. Probably because I could not discover the correct user name.

I started

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gksudo nautilus

Then I right clicked the second hdd.
I could then make the same settings in permissions as in the computer hdd.
After that, I can move files to the second sata hdd.

Tell me, if there are implications about setting permissions using that command?

[phenest]

The username you're looking for is your own.

[hthi]

If it says

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you@computer:~$

then the user name is 'you'?

Then does one write?

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sudo chown you:you 'mountpoint'

Or

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sudo chown username:you 'mountpoint'

[phenest]

If it says

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you@computer:~$

then the user name is 'you'?

Correct.

Then does one write?

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sudo chown you:you 'mountpoint'

This one.

[hthi]

Thank you.

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sudo chown you:you 'mountpoint'

Made no error messages.