Welcome, @Fakihaaa
If you already purged datasets or histories, then they will not show up again in the User → Preferences → Storage Dashboard listings under Is your usage more than expected?.
That view has two other functions that might help.
- Use the Refresh function to recalculate quota usage. The servers runs that process in the background but this forces it it happen quicker.
- The graphs under Visually explore your disk usage show what data you still have that is not purged in a different graph. Maybe that helps too?
User → Histories and User → Datasets are two more places to view data directly. Use the advanced search for histories “status = all” to show everything: active + deleted + permanently deleted (purged).
Let’s start there, and please let us know if you find your data or not. 