not syncing on high sierra classic mac pro

[Jonathan C.8]

i'm on high sierra with a classic mac pro and a wired (and wifi connection) and i'm having a problem here i haven't been able solve and i am about to have my second local tech over to try to diagnose.
dropbox has not been syncing. it seems stuck at about 180 or 280 odd files.
i have logged off and logged back into dropbox. i have shut down and restarted. i have restarted and reset PRAM.
i turned off wifi and checked Airport Utility and it appears to be a good connection but i am not sure how to check the speed? i have noticed that pages sometime seem to load very slow - like minutes - so i have to go to CNN to check if it is working.
just recently i found out photos was uploading to dropbox which i do not want and thinking this folder could be causing a problem i didn't think it through and i deleted all the photos in the camera folder. so now rhere is like almost six thousand items "syncing" in dropbox.
this is a huge problem because i have been moving data to dropbox in order fo figure out what is going to be Archived data. so it is making it hard to continue working.
anyway i'd be grateful for anything specific fo the cMP or otherwise.

[Jonathan C.8]

desperate here. i just logged out, logged back in and then upgraded to dropbox pro even though it seems like there is plenty of space on my previous 2TB plan.
still no love.

[Hannah]

Hey @Jonathan C.8, thanks for bringing this to our attention.

Do you know if you currently have more than 300K files in your Dropbox folder?

If so, it might be what's causing this, so you might want to use selective sync, to reduce the number of files in the Dropbox folder and help the app finish syncing.

Let me know how it goes.