so if my parent dataset is 1Tb and I add a single file to create a child dataset. There will now be 2Tb of data on the server. The parent dataset is duplicated on the server?

Hi @<1547028031053238272:profile|MassiveGoldfish6> , yes, every new version contains all included files

Yes. Differential Datasets are part of the ClearML Scale and Enterprise solution 😞

is this still true if the child dataset is smaller than the parent? If the parent dataset is 1Tb and I delete half the files, I will still be pushing 2Tb of data to the server?

No, it should be just the amount of files remaining