Storage usage is high

Hey guys, no idea where to place this topic. Nothings seems to fit…

Anyway, my storage is full:

While there are no local backups:

Any idea how to get more than that bar, to see what might needs cleanups?

Storage is 64 GB in size and was just 60% full or so just a couple of month ago and I didn’t stored anything new on HA or its add-ons.

Thanks for any help!

Best regards,

Ruben