# Storage tracking interactions

Every interaction of a block with the NxtFi storage is tracked within a file system. Whenever data is stored, modified, or deleted from the storage, a file is created with the timestamp of the transaction as its name. The content of this file is the actual hash of the block that executed the interaction. This ensures a complete and secure trace of the lifecycle of every piece of data.

## Obtain a list of the time stamps on which this file was stored/ modified

<mark style="color:blue;">`GET`</mark> `https://test-001-node.cloud.nxtfi.org/v2 /_trace/<scope>/<dirname>/<filename>/`

#### Query Parameters

| Name                                       | Type   | Description                |
| ------------------------------------------ | ------ | -------------------------- |
| scope<mark style="color:red;">\*</mark>    | String | scope were to query track  |
| filename<mark style="color:red;">\*</mark> | String | Path to file trace folder. |
| dirname                                    | String | folder-like prefix name    |

{% hint style="info" %}
Remember this calls should end with `'/'` as they point towards a list of interactions over the file.
{% endhint %}