[TASK] Back up raw audio data

Raw audio used for the dac paper is on lustre at:

`/mnt/lustre/projects/mfm/ecolistening/dac_audio/diurnal/`

This folder holds multiple copies of the audio, the original of which is `dc_corrected`, and the various `filtered` variations are derived from this via a number of passes of a high pass filter.

If the filtered version is useful then we should keep it to avoid having to refilter every time we run the data pipeline.

The full folder size for `diurnal` is 4.9TB.

Additional data in the `dac_audio` folder:

```
[Thu Feb 13 12:18:24 nrs23@artemis-login-0:dac_audio ] $ du -sh *
3.2T chorus
4.9T diurnal
15G EC_ID_named
4.0K README.md
11G UK_ID_named
928M visualisations
```

for a total of around 9-19 TB, but a lot of it is duplicates. Needs sorting.