Simply enter your username/email and a CloudStor app password, select which folder you like to upload and where in CloudStor you would like it to go and click Push.

There are tuning parameters and suggestions under How do I tune CloudStor Rocket?

If you have a large folder structure (including shares) Rocket may freeze and timeout with an error if it takes too long to populate the To: selector when you click the Browse button.  In this case, you can type a file path directly into the To: box instead. If it is a shared folder or group drive, type /Shared/ first. e.g. "/Shared/My Lab/Results" (without quotes). If doing this, please ensure you do not also click the Browse button.