Couchbase Server can be used to store a variety of data types, including JSON documents, XML data, and binary data. Storing JSON documents is straightforward using the N1QL query language and the .NET SDK, which automatically serializes the document type. Storing XML data requires additional steps, such as serializing an object into an XML string and then inserting it into Couchbase. Binary data can be stored as a byte array, but this format is limited to being deserialized back into a .NET object. While storing non-JSON data in Couchbase offers flexibility, it also means that those values cannot be easily indexed or queried using N1QL operations.