Disk Space

Google Drive: Gmail (and some on drive?)

22.77 GB of 102 GB

https://drive.google.com/settings/storage

iCloud: Mac backup? (check this)

17.93 GB of 25 GB

https://www.icloud.com/#settings

Dropbox: iTunes backup

754.52 GB of 1.01 TB

https://www.dropbox.com/account/plan