A partial sandbox environment copies over a sample of your Production environment's data, while a full sandbox is a literal clone of your Production environment. This means all your data from your Prod environment (people data, content, permissions, etc.) gets carried over to the sandbox, and vice versa.
With a partial sandbox, you're able to test Simpplr features like upgrades, configuration changes, customizations and new functionality.
A full sandbox may be helpful for users who would like to test configurations across their intranet, such as content layouts, user organization, page categories and site dashboards. You're able to view all of this as it would reflect in your Prod environment without having to implement it until you're ready.
Note:You're only able to copy over data and publish from your Production environment to the Sandbox environment; not the other way around.
One other difference to note is the data storage limitations. Partial sandboxes allow for a total storage of 5GB, while full sandboxes will copy over the same amount of storage your org has in its Prod environment.
Finally, you can refresh a partial sandbox every 5 days. A full sandbox only allows for a refresh every 29 days.
In Simpplr, a partial sandbox is provided at no extra charge. A full sandbox is available for an extra fee to your Simpplr environment. Contact your IC or CSM for more information.
For more information on creating and testing in a sandbox environment, check out this article!