Hi @gpriyanka ,
The diskspace of the indices occupied by Elasticsearch is as can be seen from the About / Status page above. As you can see, it is at ~500MB.
As for the warning itself how not to see it, please see above post.
On the diskspace regarding dev environment, that is up to you or the client to decide on. As mentioned above, that is a warning only. Pulse itself will try to do a self-maintenance within its directory wherever possible and manage its size.
Cheers!
Paul