Accidentally synced all my computer files to Dropbox

Hi -- I've used Dropbox before and never had issues with it basically grabbing folders on my computer.  I want to use the free version to upload and download small files for a project, but when I logged onto it recently to use it (I've used it in the past, but not within the last 18 months or so), it is syncing my whole PC.  Of course, this is creating a huge problem, because it is telling me my dropbox is full and I have to upgrade to continue to use it.  I've researched a little bit and found that I am supposed to be able to right click on the Dropbox icon on my icon tray at the botttom of my screen, and perform a selective sync.  When I do this and deselect the PC folder, it will not stay, even after clicking Apply and OK.  It goes right back to syncing my entire PC.  Now, I'm terrified, because I've seen where people have lost all of their files when they tried to disengage from using Dropbox.  So, my questions are:

1) How can I get it to stop syncing my entire PC, so I can complete my project without upgrading?

2) What are the steps to get rid of Dropbox when my project is over, without wiping out my PC?

Thank you.  

Thanks.  That didn't work.  Still syncing my PC.  Still can't upload anything.  

And, the folders that are showing synced now, which are two, are empty, so there's no way I can have too much on Dropbox.

It does look to have stopped syncing the PC, though, now.  It still shows the folder, but it is no longer checked.

I chose the keep content on my PC option.  When I pull up the app, it is still listing my PC on the Dropbox listing, though.  I don't think it is syncing it anymore, because the checkmark isn't in the box where you can choose selective syncing.  I think I need to delete the PC folder in the app to continue the use I am intending.  I am pretty sure that folder makes me over the limit for free use, but I am really afraid to do that because of what has happened to other people with it wiping out their files.  I've spent so much time on this, when all I wanted to do was use it to share some files.  😞   It should automatically remove that when someone chooses to not sync it.  It is like it tries to trick you and make you stuck so you have to upgrade.  😞

If this isn't the right category. please repost where it should go. Recently, whenever I trashed something from my desktop, I got the same message as when you remove something from the Dropbox folder. I put it down to a glitch somewhere. But today I wanted to looki for something in a file folder in the desktop Dropbox. It wasn't there. Neither were a lot of other files and folders, too. I went to my online Dropbox and whole folders are missing there, too, most of them vital.  I  came to the community and found an answer about something similar.  It said to look in the top folder and look for a folder named "mac" . I found it, opened it and  found: the Mac folders for Documents, Downloads and Desktop with all the files in them! HOW DO I GET THEM BACK OUT OF DROPBOX???!!!!

Hey Carol G.1, thanks for reaching out to us.

It looks like you've enabled our computer backup feature on the Dropbox application.

You can disable it and move your desktop folders back to their original location, by following these steps.