I recently created an account using the Nextcloud provider UNODATA. I have only 2gb of storage. Is there a way to add more because i need at least 30 40 gb of storage. I looked up in their settings and i dont see an option for adding more storage. Self-hosting is new to me and i dont have enough time to learn it as of now. Thank you for your help 
You’ll need to ask them directly. They are your provider, so they will be able to answer your hosting questions based on what they allow.