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Accepted Answer
Hello,
Yes, you can just start with the smallest available database size and upgrade whenever you need to. Basically what happens when you scale up is that extra resources like RAM, CPU and etc are added to your database server, your data stays intact.
To upgrade your Database instance just follow these steps:
Login to your DigitalOcean control panel
Then click Manage > Databases
Choose your Database instance, after that click on Settings
Under the Cluster configuration section hit the Edit button and choose the new node plan
Hope that this helps! Regards, Bobby