# Datasets, folders and downloads > Upload folders as datasets, download datasets and campaign results, decide which hosts nodes may fetch from, and give modules folders on a node. HTML version: https://docs.codonic.dev/oarbank/operate/datasets-and-folders Jobs read their inputs from datasets: content-addressed files the coordinator or an origin holds. This page covers getting files into the fleet and results out of it, and the folders a module may use on a node. ## Upload a folder ```sh oarbank dataset upload ./shots --kind inputs ``` Every regular file under the folder is hashed and uploaded, then registered as one dataset (the id defaults to `:-<8 hex digits>`; set it with `--id`). With `--module ` the dataset belongs to that module and only it sees it; without, every module sees it. An interrupted upload resumes: run the same command again, and only what the coordinator does not hold yet is sent. Symlinks and file names that are not portable across macOS, Linux and Windows stop the upload before anything is sent, naming each one. In the console, **Datasets → Upload** does the same from the browser: pick a folder, and the page hashes and uploads each file, resuming after a failure or a reload. A module may then offer an operation that turns your upload into one of its own datasets. ## Download datasets and results ```sh oarbank dataset download inputs:shots-1a2b3c4d ./here oarbank campaign download c_render_17 ./results ``` Downloads resume where they stopped and check every file’s digest. A campaign download writes each done job’s artifacts under `[-]//`. The console offers the same as zip files on each dataset’s page and each campaign’s page. ## Datasets by URL A module can register a file by its URL and digest, so nodes fetch it from the origin and the coordinator keeps no copy. Under **Settings → Dataset origins** list the hosts nodes may fetch from (`huggingface.co`, `*.example.org`); an empty list allows any public https host. A URL must be `https` to a public host name either way, and redirects are followed only under the same rule. When every origin fails for a node, the coordinator fetches the file once and serves it. ## Folders on a node A module may ask for folders by id: `read` folders it only reads, `write` folders (outboxes) it only creates files in. You approve the request with the module version; then map each id to a directory on each node under **Settings → Folders**, or with the CLI: ```sh oarbank folders map inbox --access read --node n_4f2a91c0=/Volumes/Data/inbox oarbank folders list ``` `--node` takes a node id (`oarbank fleet` lists them) and may repeat; `--node =` removes that node’s mapping. Each node checks its folders and reports them; jobs of the module run only where every folder it asks for is `ok`. A node refuses a filesystem root, a home directory itself, Oarbank’s own data, system directories, and folders that overlap each other. Caution A module can replace a file in its outbox whose name it guesses. Give each outbox an empty directory of its own. With release signing on, folder mappings are signed like releases: run `oarbank folders sign ` on the machine that holds the release key, and the node applies the new mapping only then, so nobody who takes over the coordinator can point a folder elsewhere.