When using the file browser to delete files, the files are placed into the Rubbish Bin folder. The files are not really deleted and will continue to count towards your disk quota.
You should empty your rubbish bin by:
- Opening the File Manager
- Right clicking the on Rubbish Bin
- Then selecting “Empty Rubbish Bin”.
The Rubbish bin is automatically deleted overnight, to help keep user’s data within their quota limits.