Music libraries missing


I am having an issue with my libraries stored on an external hard drive, lacie porche 4 gb. USB with audioquest jitterbug
Size of music library: +40,000 tracks

System details
MacBook Pro, early 2015, 13-inch, macOS gb ram
Roon version 1.2 (build 165) stable (64 bit)
Roon bridge macbook-pro-2016

This is the first time I’ve seen this issue.

I’ve run disk aid, and OnyX scripts, etc. to no avail.

Please help. Thank you.
Torben Simonsen