Kadlu data fetching lacks database structure
In the current version of the kadlu data fetch modules, each download query is serialized "as-is" without any ability to check if the data contained in this query has overlap with other queries that have already been saved to the disk. In the future, downloaded data should be stored and indexed for reuse using a proper database structure such as SQLite
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information