docs(ins): add creating volume step to doc

pages/instances/how-to/migrate-local-storage-to-sbs.mdx

@@ -58,14 +58,26 @@ After exporting the snapshot, you need to import it into a new SBS volume. This
       - Imported snapshots must have a volume size between 1 GB and 1 TB.
     </Message>
 
+### Creating a volume from the imported snapshot
+
+Once the snapshot has been imported into your destination Availability Zone, you must create a new SBS volume from it.
+
+1. Click **Block Storage** in the **Storage** section of the side menu.
+2. Click the **Snapshots** tab.
+3. Click the <Icon name="more" /> (More options) icon next to the snapshot you just imported.
+4. Click **Create volume from snapshot**.
+5. Enter a name for the new volume and confirm the size.
+6. Click **Create volume**. Your new SBS volume will now appear in the **Volumes** list.
+
 ## Attaching the new SBS volume to your Instance
 
 Once the new SBS volume is created, you need to attach it to your instance. This will allow you to use the new volume as your primary storage.
 
-1. Click **Block Storage** in the **Storage** section of the Scaleway console side menu. The Block Storage page displays.
-2. Click **Attach an Instance** under the **Linked Instance** section.
-3. Select the Instance to which you want to attach your volume from the drop-down.
-4. Click **Attach volume to Instance**.
+1. Click **Block Storage** in the **Storage** section of the side menu.
+2. Click the **Volumes** tab.
+3. Click **Attach to Instance** next to the volume you just created.
+4. Select your Instance from the dropdown list.
+5. Click **Attach volume to Instance**.
 
 <Message type="tip">
   Alternatively you can [create a new Instance](/instances/how-to/create-an-instance/) and use the SBS volume as boot volume for your Instance.