I have installed the Rocket Chat by following the steps provided here https://rocket.chat/docs/installation/manual-installation/ubuntu/snaps/
I have ubuntu server [Ubuntu 16.04.1]
To store the data [files], I would want to make use of this partition.
/dev/sda3 413422648 71880 392327024 1% /media/data/sd1
Do I have any configuration file where I can specify the storage path?
You can try to mount the new partition at the location of the data directory