External drive contents not showing

I have very rarely, about two times ever, seen this issue and it was fixed by a reboot.

If not, what format does the drive have (APFS, NTFS, exFAT etc)??

Any 3rd party disk utilities that might now be incompatible (Samsung Magician etc)?? Usually those are not needed and (unless needed for NTFS) might explain the issue.

"External drive contents not showing: Hi, I have an external SSD, that shows when I connect it to my MAC Mini, but it doesn't show the contents. The drive contains JPGs. Can anyone advise why this might be the case?"

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Run First Aid in Disk Utility:

If. restart does not fix this, then open Disk Utility > select the hard drive (in the left pane) > and then click the First Aid button toward-the top-ight of the window.

How to Locate Disk Utility:

Use Spotlight Search: Hold Down the command key, and then press the spacebar. Then, type Disk Utility.

Screenshot:

maybe the drive is not in a file format macOS supports by default

File system formats available in Disk Utility on Mac - Apple Support

You can check the drive in Disk Utility to see if everything looks normal there.

Show where?

have you attempted to start finger and choose the external volume and navigate to the dir with the jpgs?