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You may find a solution under How can I select a different folder for syncing with the server?.

You may find a solution under Choosing a proxy server.

You may find a solution under Autorun.

You may find a solution under Automatic update.

The program cannot connect to the server. Please make sure that your Internet connection is stable and try disabling your antivirus or firewall.

Make sure that the following ports are open: 443, 5222. If you use a proxy server, try disabling it.

The app cannot access certain files in the Yandex Disk folder. This means that the file is either in use by another program or that the file name contains invalid (non-Unicode) characters.

Check the program's access rights to your Yandex Disk folder and the files it contains. Files for syncing can't be in use by another program.

This error means that you are not logged in. Click the error message and enter your username and password.

You have run out of storage space on Yandex Disk. Remove unnecessary files, empty the Trash, or buy additional space.

The folder selected for synchronization is not accessible or has been deleted. Check that the folder is in the right place or select another folder.

For more information, see Select files and folders to sync.

You installed the app but didn't select a folder to sync or are not logged in to the program.

The folder you entered in the program settings is already being used by another Yandex Disk account. It is not possible to use the same synchronization folder with different accounts. Choose a different folder in the program settings.

For more information, see Select files and folders to sync.

You haven't chosen a folder to sync with the Disk. You can choose a folder in the program settings.

For more information, see Select files and folders to sync.

The Yandex Disk folder contains files larger than 50 GB. Files of this size cannot be uploaded to Disk.