From a sysadmin’s point of view, the introduction of OMERO.fs as part of version 5.0 means that files are now stored on the server in their original format, preserving file names and directory structures. Therefore, the import process does not duplicate pixel data and storage requirements are roughly halved in comparison with a 4.4 import including archiving the original files. Combined with the new file integrity report, you should be confident that once a successful import has taken place, storing the original files outside of OMERO is no longer necessary as your users can always download their data in its original format if they need to.