Upload app sync speed is very slow on macOS.

This happened again.
Logging out and back in worked but I lost an hour or more of work time while re-indexing happened. Seems to happen every 2-3 months. Frustrating and terrible service considering we are paying for 365TB of storage.

Hey all... I may be a bit late to the game here, but I too was experiencing this issue.  I was about to uninstall Dropbox and reinstall as this thread suggested, but then I realized that I had recently uploaded a ton of files (hundreds of GB's) and it occurred to me that I didn't make them 'online only' after the upload.  I checked my hard drive space and it was nearly full because so many files I had just uploaded were still local in my Dropbox folder (IE- taking up space on my computer's hard drive).  I made the folder in question 'Online Only' (you can do this by clicking on the folder in question in your local Dropbox folder once, then Control>click on the folder; from the menu, select "Make online-only".  Moments later, the space on my hard drive opened back up, I dropped 50GB's of fresh video files into my Dropbox folder and it uploaded in about 2 minutes (I have gig speed internet... Fios).  Viola!  Back to normal.  

Don't forget to make the folders within your local Dropbox folder "Online-only".  If your hard drive is almost full because you fail to do this, files will stop uploading to Dropbox.  At least locally.  

I'd imagine to work around this, to upload via web browser all the time.  That way, the files should automatically be set to 'online-only'.  

I'd put money down that the folks who re-install only to find it happening again a few days, week or months later is because they're not making the files "Online-only".

Thanks for trying to help but you are definitely wrong. I'm well aware of the "Online-only" and "Make available offline' feature. I'm only using 1/10 of my local hard drive storage.

I may be wrong for your situation, Twisty, but it was 'right' for my situation.  And may be for others, too.  I apologize that you didn't find any value in my post.  Just another reason why to not even post to try and help folks out.  

Same issue here but reinstall didn't help. Also what's weirder is it's only happening on one computer on the network. Laptop runs fine. Desktop is mucked

You may have already done this, but just in case... make sure all files are 'Online Only'.  My issue was on my desktop and not my laptop... but I realized one of my larger folders was set to save locally and it took up all my hard drive space.  I made it 'Online Only' and things got back to normal.  

Yes, same here, when this happens with my desktop my laptop is fine.

I presumed you logged out of dropbox before uninstalling, that seems to be key.

Hello Hannah
This thread is marked as solved, but it is not solved. Can you change that please.
My fix is a temporary work around but it has not solved the issue. 

Hello Megan
This thread is marked as solved, but it is not solved. Can you change that please.
My fix is a temporary work around but it has not solved the issue. 

I desire it to live locally though and I've set it to an external drive. One thought is to try it on the local ssd but this doesn't explain the slow browser upload. It's almost as if something in the MacOS doesn't like the Dropbox servers