sudo chown command fails to give ownership to user account

I have tried runningsudo chown dendy /mnt/storage1/

which returns

chown: changing ownership of '/mnt/storage1/': Operation not permitted

I have also tried

sudo chmod 777 /mnt/storage1/

which does not return any errors however when I check the folder permissions it still shows root for the owner and group.

What can I do to allow my user "dendy" to be able to write files to and read from these directories?

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