from http://forums.virtualbox.org/viewtopic.php?t=229 Re: Possible to merge snapshot with base VDI? Postby AntiMatter » 13. Mar 2009, 17:44 ) with the current State (so that I only have 1 large vdi-file instead of 2, and that the 'current state' is also the only state) Right click on current state (changed) Select 'Discard current snapshot and state'? And after this I have no more snapshots AND I haven't lost any data? DON'T do that. You WILL lose you latest change made after the snapshot. This was what I've done, whcih was the reason I went after documentation for clarification about this snapshot mess. What you should do to merge the snapshot into the VDI is: - Right click on the snapshot (Snap1 in your case) - Select Discard Snapshot (Ctrl+Shift+D) That's it