What types of data storage do you know for cloud and on-premise solutions?

Data storage types for cloud and on-premise solutions can be classified as follows:

Cloud Storage:

• Object Storage: for example, Amazon S3, Azure Blob Storage. Suitable for storing large volumes of unstructured data.
• Block Storage: for example, Amazon EBS, Azure Disk Storage. Used for virtual machines and databases.
• File Storage: for example, Amazon EFS, Azure Files. Allows working with files via NFS/SMB protocols.
• Database as a Service (DBaaS): managed relational (Amazon RDS, Azure SQL) and non-relational databases (DynamoDB, Cosmos DB).

On-premise Storage:

• SAN (Storage Area Network): high-performance block storage used for critical applications.
• NAS (Network Attached Storage): file storage accessible over the network.
• DAS (Direct Attached Storage): local disks directly connected to the server.
• Traditional RDBMS: relational (Oracle, MS SQL, PostgreSQL) and NoSQL solutions deployed locally.

The choice depends on performance requirements, scalability, cost, and data specifics.