Can't format an old windows hdd on linux

I have an old hdd from a laptop I don't use anymore that had windows and I'm trying to get it up and running on my linux machine but when I use gparted to try and format it, it won't let me. I'm still pretty new to all this and have tried for a while to find the answer on how to fully wipe the drive so it's clean and able to be used for extra storage reasons and not running an os reasons. I should also add that this hardrive is partitioned because I was dual booting windows and linux back when I used that particular laptop. Currently running linux on a raspberry pi if that makes a difference. Basically tells me I don't have permission or it doesn't even highlight the option to format. If anyone can help or point me in the right direction I'd really appreciate it!