The only downside of the easy way is that you have to wait for ArchiCAD to read all of those file names (over 1,700 in my copy) when you probably only want to use a few.
Using Windows Explorer or Finder, you can select the texture images that you want to use and copy them into a working folder and load that folder in Library Manager. The only hassle with this approach is that if you decide you want another texture, you have to copy it and then go into File > Lib Mgr again and do a Reload...
Karl
One of the forum moderators
AC 27 USA and earlier • macOS Ventura 13.6.9, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB