“You are not authorized to mount this device” external harddrive

Hi so I have been having issues mounting my external hard drive to my steam deck. It’s formatted in exfat so I can access its folders in my MacBook. I want to use it simply for file storage but not games.

It was working fine then it got disconnected after I had just transferred files. Now when I plug in it will not let me mount the device and the external hard drive will disconnect altogether about 30 seconds after failure to mount.

I can still access the files just fine from my MacBook.

Any advice? Do I need to give myself some kind of permission. My user is an admin. Thank you in advance!