wipe disks

Hello everyone, I hope you're all well. I've been struggling to wipe a Disk located a /dev/sdb. but shows as disk full. and it shows that disk size different here Support appreciated, Devrimer

I have some previously used in another project disks I wish to use with proxmox backup server but I can't figure out how to wipe the disks to be able to setup a datastore. I'm in the admin > Storage/Disks tab and I don't see a wipe disk button. I looked at the storage help article...