Running a very old Mac OSX 10.13 OS, however, this morning when I was dragging something over to the drive I received the subject line error. (Can’t post pics for some reason)
Digging further into this I also realized that some other files seemed a little corrupt and/or something else going on. I think this is due to some write permissions error in the latest Big Sur firmware update. I can still access the files such as “Plex” etc. stored on the drive but I can’t for example connect to my “photos” library which seems off.
I submitted a helpdesk ticket for this hoping I could downgrade to the earlier firmware since these are not listed. Any ideas?