Photos won't Import to Library

I have my photos library on an external drive 2tb of 4tb used, exFat, drive is connected direct to macbook

MacBook Pro Sequoia 15.6.1, Hard drive has 155Gb Free

For some reason now when I insert a SD card into my Mac I select files to import and hit import and nothing happens.

Restarted multiple times, rebuilt library, drive is directly connected.

Have a second hard drive that I use for temporary sports photos on a different photos library that doesn't have an issue...

Help!

[Edited by Moderator]