Clarify how storage move API decides where to store repo

doc/api/group_repository_storage_moves.md

@@ -197,7 +197,7 @@ Supported attributes:
 | Attribute | Type | Required | Description |
 | --------- | ---- | -------- | ----------- |
 | `group_id` | integer | yes | ID of the group. |
-| `destination_storage_name` | string | no | Name of the destination storage shard. In [GitLab 13.5 and later](https://gitlab.com/gitlab-org/gitaly/-/issues/3209), the storage is selected automatically if not provided. |
+| `destination_storage_name` | string | no | Name of the destination storage shard. In [GitLab 13.5 and later](https://gitlab.com/gitlab-org/gitaly/-/issues/3209), the storage is selected [automatically based on storage weights](../administration/repository_storage_paths.md#configure-where-new-repositories-are-stored) if not provided. |
 
 Example request:
 
@@ -236,7 +236,7 @@ Supported attributes:
 | Attribute | Type | Required | Description |
 | --------- | ---- | -------- | ----------- |
 | `source_storage_name` | string | yes | Name of the source storage shard. |
-| `destination_storage_name` | string | no | Name of the destination storage shard. The storage is selected automatically if not provided. |
+| `destination_storage_name` | string | no | Name of the destination storage shard. The storage is selected [automatically based on storage weights](../administration/repository_storage_paths.md#configure-where-new-repositories-are-stored) if not provided. |
 
 Example request:
 

doc/api/project_repository_storage_moves.md

@@ -211,7 +211,7 @@ Parameters:
 | Attribute | Type | Required | Description |
 | --------- | ---- | -------- | ----------- |
 | `project_id` | integer | yes | ID of the project |
-| `destination_storage_name` | string | no | Name of the destination storage shard. In [GitLab 13.5 and later](https://gitlab.com/gitlab-org/gitaly/-/issues/3209), the storage is selected automatically if not provided |
+| `destination_storage_name` | string | no | Name of the destination storage shard. In [GitLab 13.5 and later](https://gitlab.com/gitlab-org/gitaly/-/issues/3209), the storage is selected [automatically based on storage weights](../administration/repository_storage_paths.md#configure-where-new-repositories-are-stored) if not provided |
 
 Example request:
 
@@ -255,7 +255,7 @@ Parameters:
 | Attribute | Type | Required | Description |
 | --------- | ---- | -------- | ----------- |
 | `source_storage_name` | string | yes | Name of the source storage shard. |
-| `destination_storage_name` | string | no | Name of the destination storage shard. The storage is selected automatically if not provided. |
+| `destination_storage_name` | string | no | Name of the destination storage shard. The storage is selected [automatically based on storage weights](../administration/repository_storage_paths.md#configure-where-new-repositories-are-stored) if not provided. |
 
 Example request:
 

doc/api/snippet_repository_storage_moves.md

@@ -225,7 +225,7 @@ Supported attributes:
 | Attribute | Type | Required | Description |
 | --------- | ---- | -------- | ----------- |
 | `snippet_id` | integer | yes | ID of the snippet. |
-| `destination_storage_name` | string | no | Name of the destination storage shard. In [GitLab 13.5 and later](https://gitlab.com/gitlab-org/gitaly/-/issues/3209), the storage is selected automatically if not provided. |
+| `destination_storage_name` | string | no | Name of the destination storage shard. In [GitLab 13.5 and later](https://gitlab.com/gitlab-org/gitaly/-/issues/3209), the storage is selected [automatically based on storage weights](../administration/repository_storage_paths.md#configure-where-new-repositories-are-stored) if not provided. |
 
 Example request:
 
@@ -274,7 +274,7 @@ Supported attributes:
 | Attribute | Type | Required | Description |
 | --------- | ---- | -------- | ----------- |
 | `source_storage_name` | string | yes | Name of the source storage shard. |
-| `destination_storage_name` | string | no | Name of the destination storage shard. The storage is selected automatically if not provided. |
+| `destination_storage_name` | string | no | Name of the destination storage shard. The storage is selected [automatically based on storage weights](../administration/repository_storage_paths.md#configure-where-new-repositories-are-stored) if not provided. |
 
 Example request: