large iTunes / apple tv app library problem

Hi guys 

Does anyone have a large iTunes library and use and external drive to store it ?

for some reason since the last Catalina updated the tv app won't let me make shortcuts from the drive to the app or from anywhere else ether.

i normally high-light the files , hold options/alt key and drag the files while they are highlighted to the app (library tab) to create the shortcut but it won't work..........

has anyone else found this ?

its worked for years as I've had a large library for a long time so i don't understand why's its stopped working