Could you please clarify what product are you talking about? MSP360 (CloudBerry) Backup or MSP360 Explorer?
MSP360 Explorer is just a file manager to work with the files that you have in the cloud storage. It is not a backup solution.
If you need to back up your data, you should use MSP360 (CloudBerry) Backup.
And it looks like you used a free version that has some limitations. You can activate a 15 days trial period of fully functional version. You can do it in two ways:
1. right after installation at the first launch you can choose the trial version.
2. if you have already enabled free version, you can switch to trial in the Licensing section of the main menu.