You can see whether files were successfully uploaded or not via the desktop client.


Windows:



In the Windows desktop application, you will see a complete overview of the shares you have. When you select a share, its upload and download status are shown below.


When "OK", no upload or download is in progress.


MacOS:



In the macOS application, you will also see a complete overview of the shares you have.


When there's nothing shown in the grey area in the application, everything is "OK".