# Remove unused OrientDB files

## post by fdcastel on Mar 5, 2025

I successfully completed a migration from OrientDB to the H2 database by following the instructions provided [here](https://help.sonatype.com/en/migrating-to-a-new-database.html#migrating-from-orientdb-to-h2-162010_body).

Notably, step 4 states:

> Copy the produced `nexus.mv.db` file to your `$data-dir/db` directory.

However, I found it unusual that **there is no mention of removing the old OrientDB files.**

Currently, my `$data-dir/db` directory contains the following:

```yaml
drwxr-xr-x 2 root root     4096 Feb  3  2017 OSystem
 drwxr-xr-x 2 root root     4096 Aug 12  2019 accesslog
 drwxr-xr-x 2 root root     4096 Mar  3 15:56 analytics
 drwxr-xr-x 2 root root     4096 Jun 20  2019 audit
 drwxr-xr-x 2 root root     4096 Mar  3 15:56 component
 drwxr-xr-x 2 root root     4096 Mar  3 15:56 config
 -rw-r--r-- 1 root root        2 Mar  3 15:30 frozen.marker
 -rw-r--r-- 1 root root       93 Aug  8  2024 model.properties
 -rw-r--r-- 1 root root 19726336 Mar  4 01:45 nexus.mv.db
 drwxr-xr-x 2 root root     4096 Mar  3 15:56 security
```

Am I correct in assuming that only the `nexus.mv.db` file is necessary? And everything else is no longer in use?

**Which of these files and directories can be safely removed?**

## post by mpiggott on Mar 5, 2025

You should be able to archive everything except the `nexus.mv.db`

## post by fdcastel on Mar 6, 2025

Thank you, [@mpiggott](https://community.sonatype.com/u/mpiggott)! Much appreciated.

P.S.: If possible, please consider updating the documentation to include this valuable information.