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+# Data-mover
+
+Data-mover is a tool to move data between Puhti and Mahti local filesystems and
+Allas and LUMI-O object storage servers, when
+[simple transfers](../faq/how-to-move-data-between-puhti-and-allas.md#move-data-with-rclone)
+are not practical, either because there are many small files, or the size of the
+dataset is large.
+
+Data-mover stores the data in the object storage in [Restic](https://restic.readthedocs.io)
+repository format. Restic, as used by data-mover, in turn uses [Rclone](https://rclone.org)
+backend for the actual data transfers to the object storage servers and back, with S3 authentication.
+Moving data to Restic repository in an object storage could also be achieved by using Restic directly, or with
+[allas-backup tool](../../data/Allas/using_allas/a_backup/). The main differentiating feature is
+that data-mover does the actual transfers unattended using batch jobs.  
+
+## Simple example case, moving data from Puhti to Allas and back
+
+Below is a guide for a simple scenario, moving data from Puhti project scratch
+directory to corresponding project in Allas, and then back. Similar works with
+Mahti and LUMI-O. Please have a look at `data-mover help` and `data-mover <sub-command> --help`
+for additional documentation.
+
+### Setting up the connection from Puhti to Allas
+
+1. Your CSC project needs to have Allas service enabled. The project PI can add
+Allas service for the project in [my.csc.fi](https://my.csc.fi) , if not already enabled, and
+the project members need to [accept the service terms](../../accounts/how-to-add-service-access-for-project.md).
+
+2. Create a configuration for rclone and store the authentication token in the
+file `$HOME/.config/rclone/rclone.conf` in Puhti. This is easiest to do from
+[Puhti web interface](https://puhti.csc.fi). Open "Cloud storage configuration" from the
+"Tools" drop-down menu, and
+[create Allas S3 rclone configuration for the project](../../computing/webinterface/file-browser.md#accessing-allas-and-lumi-o).
+
+4. Open a terminal to Puhti, and take the data-mover tool `data-mover` into use with
+```
+module load data-mover
+```
+
+### Moving a single directory in Puhti to Allas
+
+1. Clean (delete) all the files that are not needed from the target scratch directory,
+`/scratch/<project>/exampledir`, for example. There is no need
+to compress the files separately.
+
+3. Move the data to Allas
+```
+data-mover export /scratch/<project>/exampledir
+```
+
+3. Check the status of the data transfer with
+```
+data-mover status
+```
+
+### Listing the data in Allas
+
+```
+data-mover list
+```
+
+### Moving data from Allas to Puhti
+
+Import data back to the original directory with
+```
+data-mover import /scratch/<project>/exampledir
+```
+
+## Links to related material
+
+- [Lue tool for data inventory](lue.md)
+- [Data cleaning](clean-up-data.md)
+- [Allas introduction](../../data/Allas/introduction.md)
+- [Allas-backup tool](../../data/Allas/using_allas/a_backup/)
+- [Restic](https://restic.readthedocs.io)
diff --git a/docs/support/tutorials/index.md b/docs/support/tutorials/index.md
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--- a/docs/support/tutorials/index.md
+++ b/docs/support/tutorials/index.md
@@ -12,11 +12,15 @@
 * [Developing scripts remotely](remote-dev.md)
 * [Using CSC HPC environment efficiently](https://csc-training.github.io/csc-env-eff/)
 * [How to run existing containers in Puhti](../../computing/containers/overview.md#running-containers)
-* [Getting disk usage using Lue](lue.md)
 * [Running Julia jobs on Puhti and Mahti clusters](julia.md)
 * [Using Python on CSC supercomputers](python-usage-guide.md)
 * [Setting up SSH keys at CSC](https://csc-training.github.io/csc-env-eff/hands-on/connecting/ssh-keys.html)
 
+## Data management 
+* [Managing data on Puhti and Mahti scratch disks](clean-up-data.md)
+* [Getting disk usage using Lue](lue.md)
+* [Moving large datasets to Allas](data-mover.md)
+
 ## Installation of tools on supercomputers
 
 * [Installing software with Spack](user-spack.md)