How to BIDSify polysomnographics datas?

Hi,
We would to like to BIDSify our data from differents sites. It is Polysomnography records of 80 patients from 3 centers that can be in .TRC (micromed proprietary extension) or .edf depending on the site.
In each files we have a lot of channels, including both EEG and neurophysiological data (i.e. respiration, cardiac data, …).
The question is do we keep our one polysomnographic file per night with all channels in one file, or is it to better to split the file into EEG files in a specific EEG folder, and physio folder ?
It is important to precise that it will represent a long work to split all files (around 160 files). Moreover, our biological question implies to have both information in order to interpret them .
Does it worth to split the files , and if not, should we put it in physio folder or another one?
Thank you in advance!