diff --git a/.spelling b/.spelling
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--- a/.spelling
+++ b/.spelling
@@ -1,3 +1,7 @@
+AWS
+CLI
+FAQ
+s3cmd
 GUI
 EESSI
 hipBlas
diff --git a/docs.it4i/storage/awscli.md b/docs.it4i/storage/awscli.md
new file mode 100644
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@@ -0,0 +1,52 @@
+# AWS CLI
+ 
+You can use the AWS command line tools to issue commands or build scripts at your system's command line to perform AWS (including S3) tasks.
+The AWS Command Line Interface (AWS CLI) provides commands for a broad set of AWS services. To get started, see the AWS Command Line Interface User Guide. 
+ 
+For more information, see the official site [https://docs.aws.amazon.com/AmazonS3/latest/userguide/Welcome.html#BasicsBucket][a].
+ 
+ 
+## How to Load Modules: 
+
+To see loaded modules, use:
+
+```
+ml
+```
+
+To load modules, use:
+
+```
+ml awscli
+```
+
+To see module info, use:
+
+```
+ml spider AWS
+``` 
+
+For more information on how to work with modules, see 
+[https://docs.it4i.cz/software/modules/lmod/][1].
+
+ 
+## Configuration
+ 
+For configuration steps, follow the [e-INFRA CZ guide][b].
+
+For the list of basic AWS CLI commands, see [https://docs.e-infra.cz/storage/object-storage/aws-cli/#controls-of-aws-cli---high-level-s3][e].
+
+## Useful Links
+
+* [Getting started][c]
+* [Troubleshoot AWS CLI errors][f]
+* [Configuration erros][d]
+
+[1]: https://docs.it4i.cz/software/modules/lmod/
+
+[a]: https://docs.aws.amazon.com/AmazonS3/latest/userguide/Welcome.html#BasicsBucket
+[b]: https://docs.e-infra.cz/storage/object-storage/aws-cli/
+[c]: https://docs.aws.amazon.com/cli/latest/userguide/getting-started-install.html
+[d]: https://docs.aws.amazon.com/AmazonS3/latest/API/ErrorResponses.html
+[e]: https://docs.e-infra.cz/storage/object-storage/aws-cli/#controls-of-aws-cli---high-level-s3
+[f]: https://docs.aws.amazon.com/cli/latest/userguide/cli-chap-troubleshooting.html
diff --git a/docs.it4i/storage/cesnet-s3.md b/docs.it4i/storage/cesnet-s3.md
new file mode 100644
index 0000000000000000000000000000000000000000..e6de8b12e934cf606589342ab13f83e58da82448
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+++ b/docs.it4i/storage/cesnet-s3.md
@@ -0,0 +1,52 @@
+# CESNET S3 Storage
+
+S3 service is a general service suited for most of the use cases. S3 service can be used for elementary data storing, automated backups, or various types of data handling applications.
+
+For more information, see [e-IINFRA CZ S3 Service documentation][a].
+
+## Access:
+
+To access to S3 you must:
+ 
+* have an [e-Infra CZ account][3]
+* be a [member of an active project][4]
+ 
+### Steps: 
+ 
+1. Fil in application at [https://einfra.cesnet.cz/fed/registrar/?vo=storage][b] to be a member of VO group 
+    * Provide information about the reservation capacity in TB/GB in the **Description of planned activity** field.
+ 
+2. Wait for a confirmation email with information about the endpoint (e.g. cl2) and link to [Filesender][e] where your key is stored.
+
+    !!! important "Link Expiration"
+        Note that the link has an expiration date, so download the information to your local storage. 
+ 
+    **Key Format:**
+
+    ```
+    "user": "51de0172a4***************************bc3cf1b211aacc9d5dc7876649a8",
+    "access_key": "IL2***********JAS",
+    "secret_key": "WIt******************HRAYvBtHmD"
+    ```
+    Use this information for management tool configuration.
+ 
+IT4I offers two tools for object storage management on Karolina:
+
+* [S3cmd][1]
+* [AWS CLI][2]
+  
+## Walkthroughs (Config Connection)
+
+[https://du.cesnet.cz/en/navody/object_storage/cesnet_s3/start][c]
+[https://www.s3express.com/kb/item26.htm][d]
+ 
+[1]: s3cmd.md
+[2]: awscli.md
+[3]: https://docs.e-infra.cz/account/
+[4]: https://docs.it4i.cz/general/access/project-access/
+ 
+[a]: https://docs.e-infra.cz/storage/object-storage/s3-service/
+[b]: https://einfra.cesnet.cz/fed/registrar/?vo=storage
+[c]: https://du.cesnet.cz/cs/navody/object_storage/cesnet_s3/start
+[d]: https://www.s3express.com/kb/item26.htm
+[e]: https://filesender.cesnet.cz/
diff --git a/docs.it4i/storage/s3cmd.md b/docs.it4i/storage/s3cmd.md
new file mode 100644
index 0000000000000000000000000000000000000000..dd1a3a7a6d5a1e8a54fa37e59e4f5aa36b4cc241
--- /dev/null
+++ b/docs.it4i/storage/s3cmd.md
@@ -0,0 +1,74 @@
+# s3cmd
+
+S3cmd is a command-line tool for managing data in Amazon Simple Storage Service (S3). It is a free and open-source tool that is available for Linux, macOS, and Windows.
+ 
+For more information, see [https://docs.e-infra.cz/storage/object-storage/s3cmd/][a] 
+
+We recommend using the S3cmd tool already installed on Karolina.
+
+## How to Load Modules: 
+
+To see loaded modules, use:
+
+```
+ml
+```
+
+To load modules, use:
+
+```
+ml s3cmd
+```
+
+To see module info, use:
+
+```
+ml spider s3cmd
+``` 
+
+For more information on how to work with modules, see 
+[https://docs.it4i.cz/software/modules/lmod/][1].
+
+## Configuration
+
+The s3cmd configuration file is named `.s3cfg` and it is located in the user's home directory, e.g. `/home/username/($HOME)`.
+ 
+The configuration file has to be created first:
+
+```
+s3cmd --configure 
+```
+
+For configuration steps, follow the [e-INFRA CZ guide][b].
+
+For the list of basic S3cmd commands, see [https://docs.e-infra.cz/storage/object-storage/s3cmd/#basic-s3cmd-commands][c].
+
+## FAQ
+
+Error when creating bucket:
+
+```
+ERROR: S3 error: 400 (InvalidLocationConstraint): The specified location-constraint is not valid
+```
+Solution: set location:
+
+```
+s3cmd --bucket-location=":default-placement" mb s3://newbucketname
+```
+
+## Useful Links
+
+* [Introduction][d]
+* [Usage][e]
+* [Common S3cmd Errors][g]
+* [Configuration erros][f]
+
+[1]: https://docs.it4i.cz/software/modules/lmod/
+
+[a]: https://docs.e-infra.cz/storage/object-storage/s3cmd/
+[b]: https://docs.e-infra.cz/storage/object-storage/s3cmd/#configuration-of-s3cmd-tool
+[c]: https://docs.e-infra.cz/storage/object-storage/s3cmd/#basic-s3cmd-commands
+[d]: https://s3tools.org/s3cmd
+[e]: https://s3tools.org/usage
+[f]: https://docs.aws.amazon.com/AmazonS3/latest/API/ErrorResponses.html
+[g]: https://s3tools.org/kb/category1.htm
diff --git a/mkdocs.yml b/mkdocs.yml
index d1ee8964ea0de9dbe4c3f8c04d2171bfce0041eb..2fbec8dd0a02749a37a068f4b6df20e8e5de1066 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -128,7 +128,12 @@ nav:
     - PROJECT: 
       - Project storage: storage/project-storage.md
       - Proj4 storage - S3: storage/proj4-storage.md
-    - CESNET: storage/cesnet-storage.md
+    - CESNET:
+      - CESNET: storage/cesnet-storage.md
+      - S3: 
+        - Introduction: storage/cesnet-s3.md
+        - S3cmd: storage/s3cmd.md
+        - AWS CLI: storage/awscli.md
     - Access Control List:
       - Standard File ACL: storage/standard-file-acl.md
       - NFSv4 File ACL: storage/nfs4-file-acl.md