I recalculated disk usage for your account at http://usegalaxy.org. It did not change - usage is at 138.7 GB.
Guy and Devon are both correct - purging (permanently deleting) is required to free up disk space. If at Galaxy Main, then just follow the help in the wiki link below. If on your own local, do the admin change Guy suggests first, restart the server, then follow the same wiki help.
How to perm delete/purge: https://wiki.galaxyproject.org/Learn/ManagingDatasets#Delete_vs_Delete_Permanently
Best, Jen, Galaxy team