Does this tool take backup in an incremental fashion

Say i have cluster on day 1 having 2 keyspaces , having a combined size of 100G, using the tool i triggered the backup and uploaded 100G of data to s3 by the end of day.
On day 2 say my cluster receives new data and so the total size of the cluster become about 200G(100G of new data).
So when i trigger the backup for day 2
will the tool start uploading data from the beginning (i.e. all of 200G)
or will only upload the new data(100G)