Which OCI storage service is suitable for backups that need to be stored for months but retrieved immediately?

The suitable OCI storage service for backups that need to be stored for months but retrieved immediately is object storage (standard).

Object storage is designed for storing large amounts of unstructured data and offers high durability, scalability, and accessibility. It allows for immediate retrieval of data, making it ideal for backup scenarios where quick access is required. With object storage, you can efficiently store backups for the long term while ensuring that they are readily available when needed.

In contrast, block volume is typically optimized for high-performance applications where low-latency access is critical, but it is not specifically designed for long-term backups. Archive storage is intended for data that is accessed infrequently and may have retrieval delays, making it unsuitable for scenarios that require immediate access. File storage provides a network file system suitable for workloads that require shared access to data but is not the optimal choice for long-term backup storage needs.