can't format my second HD

[Athrwys]

hi there
I recently moved from win10 to mint, and in the processes i wanted to format all my storage-i have 2, 1 ssd which i made work and formatted, and 1 hdd that is the problem.
in a way to try and format i installed Gparted, but when i try to use it, the partition i want to format doesn't show any process that i could make, it's a ntfs system, and it has win10 files and was parted in win10
i wold like to a way to format it, without having to go to windows again
(Sorry for the spelling and grammatical errors, English isn't my first language)

[grndplane]

Try Gparted. Delete the offending partition and hit apply. Then add the new partition.

[AndyMH]

I suspect the partition you are trying to delete is mounted. You cannot change/delete a mounted partition. You need to un-mount it first. Right click on it and un-mount.

The partition highlighted is mounted, it tells you where it is mounted.

Note - when you create new partitions with gparted it will tell you what will happen at the bottom of the window. Nothing happens until you edit > apply all changes.

I recommend you add labels to all your data partitions, e.g. mylabel. Mint will automount them at /media/you/mylabel. If you don't add a label mint will automount using the UUID (a long number), not user friendly. Keep your labels short and avoid spaces.