# sector-storage [](http://ipn.io) [](https://circleci.com/gh/filecoin-project/sector-storage) [](https://github.com/RichardLitt/standard-readme) > a concrete implementation of the [specs-storage](https://github.com/filecoin-project/specs-storage) interface The sector-storage project provides a implementation-nonspecific reference implementation of the [specs-storage](https://github.com/filecoin-project/specs-storage) interface. ## Disclaimer Please report your issues with regards to sector-storage at the [lotus issue tracker](https://github.com/filecoin-project/lotus/issues) ## Architecture  ### `Manager` Manages is the top-level piece of the storage system gluing all the other pieces together. It also implements scheduling logic. ### `package paths` This package implements the sector storage subsystem. Fundamentally the storage is divided into `path`s, each path has it's UUID, and stores a set of sector 'files'. There are currently 5 types of sector files - `unsealed`, `sealed`, `cache`, `update` and `update-cache`. Paths can be shared between nodes by sharing the underlying filesystem. ### `paths.Local` The Local store implements SectorProvider for paths mounted in the local filesystem. Paths can be shared between nodes, and support shared filesystems such as NFS. stores.Local implements all native filesystem-related operations ### `paths.Remote` The Remote store extends Local store, handles fetching sector files into a local store if needed, and handles removing sectors from non-local stores. ### `paths.Index` The Index is a singleton holding metadata about storage paths, and a mapping of sector files to paths ### `LocalWorker` LocalWorker implements the Worker interface with ffiwrapper.Sealer and a store.Store instance ## License The Filecoin Project is dual-licensed under Apache 2.0 and MIT terms: - Apache License, Version 2.0, ([LICENSE-APACHE](https://github.com/filecoin-project/sector-storage/blob/master/LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0) - MIT license ([LICENSE-MIT](https://github.com/filecoin-project/sector-storage/blob/master/LICENSE-MIT) or http://opensource.org/licenses/MIT)