Dropbox Smart Sync Mac

admin 11/22/2021
  1. Dropbox’s Smart Sync feature lets you clear space by setting your files and folders as “online only.” This means that they will only be accessible online until you decide to download them to your hard drive. Unlike with Selective Sync, you can still see these files in your Dropbox folder, meaning they’re always just a click away.
  2. Sep 26, 2017 I have a support ticket in to Dropbox but can't wait any longer for a solution. The Smart Sync option isn't working. On my Mac, it shows that I have the majority of my files synced to 'online-only' through the Smart Sync application, but it's still taking up space on my hard drive. 3.17TB to be exact.

Online-only explained

If you set a file or folder to online-only, it is removed from your hard drive so that it’s only stored in your account on dropbox.com. You can still see the file or folder on your computer, but it’s just a placeholder. You need to be connected to the internet to open it. If you open the file, it becomes local and saves back to your computer’s hard drive. If you move, delete, or re-name it on your computer, even while offline, those changes will be mirrored on dropbox.com once your device is back online.

Smart Sync vs. selective sync

Selective sync also helps you save hard drive space by removing files from your hard drive so that they’re only saved on dropbox.com. However, you won’t be able to see those files or folders on your computer at all and there’s no automatic option for selective sync.

My Dropbox Isn't Syncing

Use Dropbox’s Selective Sync or Smart Sync to Save Space on Small Drives Posted on January 23, 2020 January 13, 2020 by Jimmy Obomsawin If you’re like many of my clients who use Dropbox intensively, you have a desktop Mac with a large drive and a MacBook with much less drive space.

Automatic Smart Sync

Smart Sync Online Only Dropbox


You can turn on automatic Smart Sync so that files you don’t open from your computer for a few months become online-only automatically and new files you add to dropbox.com become online-only by default.

To turn on automatic Smart Sync:

  1. Click the Sync tab.
  2. Under Save hard drive space automatically,select On.

If you don’t open a file or folder from your computer for a few months, it’ll become online-only to save you hard drive space. If an application on your computer needs a file to be local to function properly, automatic Smart Sync will set it to local temporarily and return it to online-only later.

Make files added to the web default to online-only

Dropbox Smart Sync Issues Mac

You can make all files that you add to dropbox.com online-only by default in two ways:

  • Turn on automatic Smart Sync. (Instructions above).
  • Change this in your preferences. To do so:
  1. Click the Sync tab.
  2. Click the dropdown next to Files added on web default and click Online-only.
    • If automatic Smart Sync is on, you can’t choose this option because your files already default to online-only.

Why online-only files may take up a little space

Online-only files take up a small amount of space on your hard drive because the placeholder requires space to store the file name and the shortcut to dropbox.com, but it takes up much less space than the file itself would.

Note: On Mac, online-only files may appear to take up the full amount of space. To fix this, follow the instructions in the “Set online-only files to zero ‘logical’ size” section of this article.

Dropbox smart sync not working mac

System requirements for Smart Sync

Mac: OS X Mavericks (10.9)

My dropbox isn

Windows: 7 and up

Note: You can’t use Smart Sync on a mobile device, but you can set your Dropbox files to open on your mobile device while you’re offline.