How to Create 2 Volumes and 2 Destination

1

How if i create 2 volumes and 2 destination in one app.

example like this

[mounts]
  source="base_storage"
  destination="/var/www/html/web/app/uploads"

that’s 1 volume storage and how to create 1 volumes again on single app ?. can i create this again ?

[mounts]
  source="base_storage"
  destination="/var/www/html/web/app/uploads"

[mounts]
  source="extra_storage"
  destination="/var/www/html/web/app/assets"