Eternal syncing - Not possible to connect to the network

[Pborras]

After several weeks to sync 40000 images, it seems that 322 are missing. I work with an external drive connected to Mac Mojave and the option of keep an original of all images in this hard disk. 

The cloud symbol appears to be syncing (a blue circle moving around) but if I click there appears a message saying "Is not possible to connect to network). At the bottom of that window, a message saying "syncing". Find attached a capture. 

I would appreciate any help. 

[Pborras · Accepted solution]

Just in case could help someone, Adobe solved partially the problem. A member of the support team suggest me to not save originals to an external drive, only in local. If I configure LR to do this, it works properly. The problem is that my internal disk has not enough space for all my photos, so now I only have them to the cloud. 

[Theresa J]

Thanks for sharing the solution. Maybe you can manually back all your photos to an external drive just to have them. Or, if you have Lightroom Classic you could set up the Classic preferences to download Lightroom photos to your external drive, and then turn on the sync with Lightroom. Every once in a while you could open Classic, just so it could pull down the photos that are in the cloud. The benefit of this workflow is that Classic will also store the edits you make in Lightoom.

Don't use Classic to import photos though because that will start to confuse where things are.