If you've verified that Dropbox is installed on all of your devices, and that you're online, move on to step 2.Fix: If you think you may be missing a shared folder, you can check the list of folders that can be re-added to your Dropbox.If you've verified that you're a member of all shared folders, move on to step 4.
Fixes for sync issues can range from easy to complex, but any solution will require you to take some action.
Fix: If you do not see the tray icon, you do not have Dropbox installed on your computer.
You should reinstall the Dropbox desktop application.
Fix: If the Desktop icon is grey, then you are not currently connected to the internet.
Are you having issues with the installer failing and/or shooting out various errors causing the app from installing?
Though not intentional, there may be various issues that can cause the installation process to fail.Here are some general troubleshooting techniques that can help get you locked and loaded.Do your files look different between your computer, tablet, phone, or dropbox.com? This step-by-step article will walk you through troubleshooting steps, and will solve the majority of syncing problems.Follow these steps to link a computer and other devices to your Dropbox. If your files have not synced after restarting, move on to step 6.Fix: Add the Dropbox cache folder to an ignore list on your security/antivirus software. Once synced, you should no longer see these warnings or quarantine messages.Note: Unlike other folders in Dropbox, the ".dropbox.cache" folder should have a red X on it—this folder does not need to sync.