(macOS) Lightroom Classic Fichier introuvable from external drive

Are there question mark icons on your folders? Are there exclamation point icons on your files? 

From the translation to English:

all my photos are marked as "not found" even if I ask to locate them

Exactly what are the steps you used "to locate them". Please be specific and detailed.

Welcome to the Lightroom Community @Aurélie29346117ynhd. I'll need some more info to help you figure this out.

What version of Lightroom & the macOS are you working on? Was this working before & has it stopped working since a recent update?

Try these troubleshooting steps to fix any underlying permissions issues:

• Ensure Lightroom has all the required permissions on the macOS: https://community.adobe.com/t5/lightroom-classic-discussions/quick-tips-how-to-give-full-disk-access...
  On macOS Ventura, the steps are slightly different. Search for 'Full disk access' in the search box in the macOS preferences.
• Try this step on the external drive.
  • Search for Disk Utility from Finder's spotlight search or magnifying glass.
  • Run the 'First Aid' diagnostic on the external drive. Check this to learn more: https://support.apple.com/en-us/HT210898
  • Restart the computer

     

Let me know how it goes. Thanks!
Sameer K