Syncing Cloud Library with Large Library Issue

Are you subscribed to Apple Music (streaming service) or to iTunes Match?

there is a 100,000 song limit that applies (purchased songs are exempted). Is your library that large?

is any individual file larger than 200MB? That may also cause a failure..

"Syncing Cloud Library with Large Library Issue: Dear Sir / Madam, I am unable to get my music library to cloud sync. My library is about 3TB, so large. It does gather the info, which takes days. I have done this 3 times in full now. But then I get an error as soon as it completes the archiving, and says it cannot upload the library. What is a realistic way of getting this resolved? Because I would really like to have access to my library using Apple Music. Appreciate your help, Carlo"

-------

Apple Music Not Uploading:

A. Provide a Screenshot of the Error Message:

IMPORTANT: Take a screenshot of this error message your are getting. IMPORTANT: Block out any personal info (i.e. names an eMail addresses) by covering them up with red-colored rectangles and such, through use of the Photos app. Go here: Take a Screenshot on Mac - Apple Support

B. Trun Off VPNs:

Are you using any VPNs? If so, turn them off.

C. Use Ethernet:

Speed would most certain play a role in connectivity, as not all routers may be making optimum Data Transfer Rates. If not Ethernet Port, which adapter to get depends on the model of your Mac: Connect your Mac to the Internet Using Ethernet - Apple Support

D. New iCloud Sessions:

Sign out of iCloud on all of your devices associated to your Apple Account, and then sign in, one device at a time. It may all need to re-sync.