It shows as connecting and cannot synchronize data to the folder?
Hey there, @Junednq, welcome to our Community!
Let's jump right into this. To help me troubleshoot, could you please share your device's exact OS, the Dropbox app version, and its current syncing status? You can find this information by hovering your mouse over the Dropbox icon in your menu or taskbar (next to your Wi-Fi icon).
Do you have any proxy, VPN, firewall, security software, or ISP/router settings that could be restricting traffic to the following Dropbox domains? If so, could you try temporarily disabling them to see if that helps? Are you, by any chance, also located in China?
Lastly, please:
Essentially, I want to make sure that there are fewer than 300k files located in your Dropbox folder at the moment. In some cases, having more files than that can cause performance issues for the Dropbox app.
Keep me posted, and we'll take it from there!