How do i delete old photos from my older posts? my storage is being wasted on old photos

[Grapeshot]

when i manage my attachments i can clearly see old photos that are wasting storage space, Ive seen
the photo attachements under settings but there is no option to delete them.
Im using half of my photo storage and want to free storage space. thanks in advance

Removing Stored Attachments
Go into your Profile page
Select the drop-down ‘Forum Actions’ and select ‘General Settings’
Scroll down the left panel and click on ‘Attachments’
Click the selection boxes for all the images that you want to remove or select the top box for ALL
Click on ‘Delete Selected’
WARNING:
Any images that you delete will be removed from the original threads so clear down only the very old as a starting point.