# Concepts

Understand how nexus-fs works under the hood.

| Page | What you learn |
|------|----------------|
| [How Mounting Works](mounting.md) | URI parsing, namespace routing, mount point derivation |
| [How Backends Work](backends.md) | Connector registry, credential discovery, backend lifecycle |
| [fsspec Internals](fsspec-internals.md) | How the `NexusFileSystem` adapter bridges fsspec to nexus-fs |
