How do I allow access to removable volumes?

[thisisnotsound]

Another day, Apple advised me to try with a completely fresh install, so I formatted my drive, installed a brand new Sonoma. I still get the error message.

 

[kryptticAZ]

Typical Apple... putting it on the customer to waste their day starting from scratch when they likely know it's a problem on their end but don't care because they don't make any money supporting third-party drives.