How do I give myself read/write access/permissions for my external drive?

Im a brand new Mac user, so please stay with me.
I have an external drive and I can't delete, modify, ANYTHING on it. When I go to "Get Info" it says "You can only read" under sharing & permissions. How do I change this?

When you get info on the external drive, at the very bottom is a box you can check
"Ignore ownership on this volume"...
If you check that, then see if you can delete and move things around.
If that doesn't work then try clicking on the + sign and adding you as an admin so you can Read & Write.

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If you check that, then see if you can delete and move things around.
If that doesn't work then try clicking on the + sign and adding you as an admin so you can Read & Write.

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How do I give myself read/write access/permissions for my external drive?

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