Upgraded to Lightroom 8 yesterday and when I right click a folder and use the synchronize folder option it hangs.
Have to use task manager and ":End Task" to clear
After several attempts got frustrated reinstalled Lightroom 7.5 (which works)
Sorry to hear that the "synchronize folder" option is not working in Lightroom Classic CC 8.0 version.
Are you syncing a folder that is present on your primary drive? How many images are there is the folder you're trying to synchronize?
I tried reproducing this issue but it works fine as expected.
Primary drive (not an USB)