Providing platform support for snapshotting and exporting is something that was discussed during the last ICP.Lab on Storage and Scalability , and is something that DFINITY wants as well.
Maybe @dsarlis or @ulan can give an update on the state of these features.
The feature to provide snapshots and the ability to export/download those snapshots is in the early stages of discussion and exploring the scope. The relevant people are working on other items at the moment but it’s in the bucket of next features to pick up more actively. I don’t have a precise estimate to give now besides that we’re most likely looking at a couple of months at least before we have some results.