CERNBox is a cloud-like storage solution which in addition to providing a convenient web-based interface, is also accessible via lxplus (and other machines) to directly connect to your data. It is built on the EOS file storage system.
You should consider using CERNBox/EOS for all your large root file storage needs.
To activate you CERNBox, just head to cernbox.cern.ch.
For more details on how to use CERNBox, see these links: