How to partition external hard drive? Partition option greyed out
I'm trying to partition my Seagate 2TB external hard drive with my MacBook Air M1.
I've formatted it to Mac OS Extended (Journaled) and ExFAT but neither solves the issue.
I've attached two screenshots which show I also don't get the option to add a 'Scheme' e.g. GUID partition map.
MacBook Air 13″, macOS 11.1