Here was my solution from back in May. I'll repost. It came from a Dropbox specialist. This is AFTER you've done all teh basic things
OK - solved it. What worked finally for me was the following advice I got from one of the specialists. (This is after I'd done all the other things, eg uninstall, re-install, check the right boxes for the switch etc - see Emma's post for that).
As I understand it, you are seeing online-only files are still taking up local disk space, is that correct?
In order to resolve the issue, could you please try the following steps?
1. Please go to Preferences - [Sync] tab, and ensure that under smart sync the "files added to web default" is set to "online-only".
2. Please go to Selective sync setting to unselect all the folders.
3. Please wait until all the contents of your account are removed from the local Dropbox folder (please check the sync status by clicking on Dropbox icon from the menu bar and wait until the sync status says "Up to date").
4. Once your local Dropbox folder becomes empty, check the storage of your Mac at this point. (About this mac - Storage)
5. Please again go to the selective sync setting and check the checkboxes next to the folders that you want to sync.
6. Once the sync status again says "Up to date", please again check the storage of your Mac. It should be no change from the previous time.
HOpe this works for you all , too
Me too but on mac... Defeats the purpose of smart sync... When i go to the file and it says the size, which is 200MB and then it says space used on disc is zero. But the computer still thinks its taking up space so it limits your overall data.
#1 here is what you need to do to clear up space and get selective sync working (hopefully). I'm still not entirely convinced that selective sync is working for me but regardless, if you need to clear space you need to empty the cache which is hidden. Here are the instructions:
#2 WTF is going on with Dropbox support? I'm getting an email on this thread every day
--Almost impossible to find my previous posts
--Dropbox support seems absent/non-responsive even though the solution to this selective sync problem is well documented on this site and elsewhere - your customers are the general public, not developers
--When I click through my emails I'm taken to the latest thread with no way to find my last post (i.e., no context for what is happening) making it really difficult to do anything but post the same thing over and over
--Do you really expect your customers to dig through a thread of 100+ pages to find the answer to this problem? Is it still 2002 at Dropbox HQ?
Same problem here! Smart sync files in "online only" folders selected in smart sync still appear as local, my HD still appears to have the same amount of GB available. In system information - documents - "large files", the files are also detected by the system as taking up space locally. In other words, they are still on the HD.
I have emptied the dropbox cache, to no avail. I have shut down and reopened the computer, to no avail.
Could there be a problem between "selective sync" and "smart sync" that the dropbox team has overlooked - or hasn't fixed yet? (Selective sync simply removes the folders/files from the HD, without the smart sync option of still seeing them locally as thumbnails).
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