Regarding this, how do I refresh Dropbox?
To download or sync updates to your phone or tablet, launch the app and tap a file, or open the Offline files tab. If you don't see a file, pull down to refresh the file view. Learn more about the syncing status of Dropbox files on a mobile device.
Secondly, how do I synchronize Dropbox? On Android devices, offline files display an alert icon if they were modified while you were offline. These files then need to be manually synced. To sync the latest version, tap Update all in the Offline files tab. Camera uploads don't automatically start or resume unless the Use Cellular Data option is set to On.
Just so, why is my Dropbox not updating?
Dropbox Files Not Syncing on Android
The best solution is to plug your Android device into a computer and manually move files over to bypass problems with file size or download speed. You can also solve some problems by clearing the cache. If an app doesn't support Dropbox, it will not sync automatically.
Why does my Dropbox keep syncing?
Your Dropbox account is over its storage quota. (To see if this is causing the sync issue, click the Dropbox icon in your taskbar (Windows) or menu bar (Mac), click your profile picture or initials, click Preferences, then click Account.)