Title says it all, I hope!
We have a SharePoint 2010 SP1 and one of our collections regularly goes over their quota (and ask for us to extend it).
We would like to know if there is an absolute ceiling limit for a collection size that we can set for their collection and tell them once this is reached there is nothing further we can do without creating a new collection for them to split their storage, or migrate them to SharePoint Online (we will be moving to this, but not yet so it's not an ideal solution if anyone suggests this)?
Reading https://technet.microsoft.com/en-us/library/cc262787(office.14).aspx suggests that there is a supported 4TB content database limit so should we, in theory, be able to have a single collection within this database which could have a maximum supported storage limit of 4TB for whatever content they choose to upload?
The collection is for an estates department who regularly receive large documents and data files (the largest files are raw and 3D and other rendering software types) and they have explicitly stated that they require everything stored on there to remain in case they ever have to go back to access any data.