There was a critical issue in 3.1.277 which caused drive items being disappeared from your list. Please update to this version if you have the issue.
Welcome to NetDrive3
With NetDrive you can connect remote storages as a local or network drive. When it’s connected as a drive you can use remote storages with all of your applications. You don’t have to download, edit and upload your files.
NetDrive3 is fast as before and comes with entirely new User Interface and asynchronous upload.